The fact that they only brought the woman could further indict them for their hypocrisy.
Discovering more information.
1.) Jews under Roman rule had no authority to carry out the death penalty on their own.
They brought him to the judgement hall to Pilate.
John 28 Then led they Jesus from Caiaphas unto the hall of judgment: and it was early; and they themselves went not into the judgment hall, lest they should be defiled; but that they might eat the passover.
29 Pilate then went out unto them, and said, What accusation bring ye against this man?
30 They answered and said unto him, If he were not a malefactor, we would not have delivered him up unto thee.
31 Then said Pilate unto them, Take ye him, and judge him according to your law. The Jews therefore said unto him,
It is not lawful for us to put any man to death:
2.) I have also looked at adultery, and the death penalty under Roman rule as well. What they came up with..... In the absence of death penalty.
Mt 19:3 The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away his wife for every cause?
In lieu of the death penalty therefore a writing of divorcement a man was freed of his adulterous wife.
For EVERY cause........Even adultery... Divorce left the woman's betrothal contract rights and benefits null and void...
As Joseph was going to do with Mary.
Mt 1:18 Now the birth of Jesus Christ was on this wise: When as his mother Mary was espoused to Joseph, before they came together, she was found with child of the Holy Ghost.
19 Then Joseph her husband, being a just man, and
not willing to make her a publick example, was minded to put her away privily.
20 But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost.
So, let us go back to Matthew......keeping in mind, Jew's had lost their authority to sentence or penalize with the death penalty.....
3 ¶ The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away his wife for every cause?
4 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female,
5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?
6 Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
7 They say unto him, Why did Moses then command to give a writing of divorcement, and to put her away?
8 He saith unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.
9 And I say unto you, Whosoever shall put away his wife,
except it be for fornication, and shall marry another, committeth adultery: and whoso marrieth her which is put away doth commit adultery.
Just thought I would bring these things up for consideration in the text......
Were the Pharisees allowing men to divorce wives for the simplest reasons? Causing their wives adultery according to Jesus doctrine?
Was the writing, as a writing of divorcement?
Jer 3:8 And I saw, when for all the causes whereby backsliding Israel committed adultery I had put her away, and given her a bill of divorce; yet her treacherous sister Judah feared not, but went and played the harlot also.