The Mulsum Quran does allows for the beating of a wife if they are disobedient. Below are recognised translations of this verse, followed by quotes from other Islamic sources that this hitting did occur.
The following quotes can be found in any Qur'an. See 4:34
Qur'an 4:34 Men are superior to women on account of the qualities with which God has gifted the one above the other, and on account of the outlay they make from their substance for them. Virtuous women are obedient, careful, during the husband's absence, because God has of them been careful. But chide those for whose refractoriness you have cause to fear; remove them into beds apart, and scourge them: but if they are obedient to you, then seek not occasion against them: verily, God is High, Great! Rodwell
Qur'an 4:34 Men have authority over women because God has made the one superior to the other, and because they spend their wealth to maintain them. Good women are obedient. They guard their unseen parts because God has guarded them. As for those from whom you fear disobedience, admonish them and send them to beds apart and beat them. Then if they obey you, take no further action against them. Surely God is high, supreme. Dawood
Qur'an 4:34 Men are in charge of women, because Allah has made the one of them to excel the other, and because they spend of their property (for the support of women). So good women are the obedient, guarding in secret that which Allah has guarded. As for those from whom you fear rebellion, admonish them and banish them to beds apart, and scourge them. Then if they obey you, seek not a way against them. Lo! Allah is ever High Exalted, Great. Pickthall
Qur'an 4:34 Men are the managers of the affairs of women for that God has preferred in bounty one of them over another, and for that they have expended of their property. Righteous women are therefore obedient, guarding the secret for God's guarding. And those you fear may be rebellious admonish; banish them to their couches, and beat them. If they then obey you, look not for any way against them; God is All high, All great. Arberry
Qur'an 4:34 Men are the maintainers of women because Allah has made some of them to excel others and because they spend out of their property; the good women are therefore obedient, guarding the unseen as Allah has guarded; and (as to) those on whose part you fear desertion, admonish them, and leave them alone in their sleeping places and beat them; then if they obey you, do not seek a way against them; surely Allah is High, Great. Shakir
Qur'an 4:34 Men are the protectors and maintainers of women, because Allah has given the one more (strength) than the other, and because they support them from their means. Therefore the righteous women are devoutly obedient, and guard in (the husband's) absence what Allah would have them guard. As to those women on whom part you fear disloyalty and ill conduct, admonish them (first), (next), refuse to share their beds, (and last) beat them (lightly); but if they return to obedience, seek not against them means (of annoyance) for Allah is Most High, Great (above you all). Ali
Here is a Hadith from Bukhari, vol. 7, # 715, that details Islamic wife beating:
"Narrated Ikrima: 'Rifaa divorced his wife whereupon Abdur-Rahman married her. Aisha said that the lady came wearing a green veil and complained to her (Aisha) and showed her a green spot on her skin caused by beating. It was the habit of ladies to support each other, so when Allah's messenger came, Aisha said, "I have not seen any woman suffering as much as the believing women. Look! Her skin is greener than her clothes! When Abdur-Rahman heard that his wife had gone to the prophet, he came with his two sons from another wife. She said, "By Allah! I have done no wrong to him, but he is impotent and is as useless to me as this," holding and showing the fringe of her garment. Abdur-Rahman said, "By Allah, O Allah's messenger! She has told a lie. I am very strong and can satisfy her, but she is disobedient and wants to go back to Rifaa." Allah's messenger said to her, "If that is your intention, then know that it is unlawful for you to remarry Rifaa unless Abdur-Rahman has had sexual intercourse with you." The prophet saw two boys with Abdur-Rahman and asked (him), "Are these your sons?" On that Abdur-Rahman said, "Yes." The prophet said, "You claim what you claim (that he is impotent)? But by Allah, these boys resemble him as a crow resembles a crow.""
Note Islamic women were suffering from beating more than their non muslum counterparts: "I have not seen any woman suffering as much as the believing women. Look! Her skin is greener than her clothes!"
HADITH OF THE SUNAN OF ABU DAWUD
CHAPTER 709 ON BEATING WOMEN #2142
Umar reported the prophet as saying: "A man will not be asked as to why he beat his wife".
HADITH OF THE SUNAN OF IBN-I-MAJAH
Like Abu Dawud, Ibn Majah also has a short chapter dedicated to the topic of wife beating.
#1985
Iyas b. ‘Abdullah, the son of Abu Dhubab reported that Allah’s Messenger said, "Do not beat the slave girls (women folk)." Then Umar visited the Holy Prophet and said, "Allah’s Messenger, women have become emboldened towards their husbands. So allow us to beat them. So, they were beaten (when permission was granted). upon this many groups of women went round the family of Muhammad. When it was morning, he, (the Holy Prophet), said, "Seventy women went round the family of Muhammad this night. Every woman was making a complaint against her spouse. You will not find them the best among you.
#1986
Ash’ath b. Qais is reported to have said, "One night Umar arranged a feast. When it was midnight, he got up and went towards his wife to beat her. I separated them both. When he went to bed, he said to me, "O Ash’ath, preserve from me a thing that I heard from Allah’s messenger. (These things are): A man will not be taken to task for beating his wife (for valid reasons) and do not sleep without observing witr prayer." I forgot the third (exhortation).
Mahummad was known to have hit his wives, himself.
Sahih Muslim #2127:
…When it was my turn for Allah's Messenger to spend the night with me, he turned his side, put on his mantle and took off his shoes and placed them near his feet, and spread the corner of his shawl on his bed and then lay down till he thought that I had gone to sleep. He took hold of his mantle slowly and put on the shoes slowly, and opened the door and went out and then closed it lightly. I covered my head, put on my veil and tightened my waist wrapper, and then went out following his steps till he reached Baqi'. He stood there and he stood for a long time. He then lifted his hands three times, and then returned and I also returned. He hastened his steps and I also hastened my steps. He ran and I too ran. He came (to the house) and I also came (to the house). I, however, preceded him and I entered (the house), and as I lay down in the bed, he (the Holy Prophet) entered the (house), and said: Why is it, O 'Aisha, that you are out of breath? I said: There is nothing. He said: Tell me or the Subtle and the Aware would inform me. I said: Messenger of Allah, may my father and mother be ransom for you, and then I told him (the whole story). He said: Was it the darkness (of your shadow) that I saw in front of me? I said: Yes. He struck me on the chest which caused me pain, and then said: Did you think that Allah and His Apostle would deal unjustly with you?…
Sahih Muslim #3506:
Jabir b. 'Abdullah reported: Abu Bakr came and sought permission to see Allah's Messenger. He found people sitting at his door and none amongst them had been granted permission, but it was granted to Abu Bakr and he went in. Then came 'Umar and he sought permission and it was granted to him, and he found Allah's Apostle sitting sad and silent with his wives around him. He (Hadrat 'Umar) said: I would say something which would make the Holy Prophet laugh, so he said: Messenger of Allah, I wish you had seen (the treatment meted out to) the daughter of Kharija when she asked me some money, and I got up and slapped her on her neck. Allah's Messenger laughed and said: They are around me as you see, asking for extra money. Abu Bakr then got up went to 'Aisha and slapped her on the neck, and 'Umar stood up before Hafsa and slapped her saying: You ask Allah's Messenger which he does not possess. They said: By Allah, we do not ask Allah's Messenger for anything he does not possess….
So as you can see the Muslum religion encourages domestic violence against women. This is a terrible thing and should not be allowed to happen. Anyone in the Muslum faith should seriously consider what they are taught and believe.