We will begin here:
Romans 10:5 For Moses writes about the righteousness which is of the law, “The man who does those things shall live by them.”6 But the righteousness of faith speaks in this way, “Do not say in your heart, ‘Who will ascend into heaven?’” (that is, to bring Christ down from above) 7 or, “‘Who will descend into the abyss?’”(that is, to bring Christ up from the dead). 8 But what does it say?
“The word is near you, in your mouth and in your heart” (that is, the word of faith which we preach): 9 that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. 10 For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation. 11 For the Scripture says, “Whoever believes on Him will not be put to shame.” 12 For there is no distinction between Jew and Greek, for the same Lord over all is rich to all who call upon Him.
13 For “whoever calls on the name of the Lord shall be saved.”
NKJV
Here it is in Amplified:
5 For Moses writes that the man who practices the righteousness which is based on law [with all its intricate demands] shall live by it. 6 But the righteousness based on faith [which produces a right relationship with Him] says the following: “Do not say in your heart, ‘Who will ascend into Heaven?’ that is, to bring Christ down; 7 or, ‘Who will descend into the abyss?’ that is, to bring Christ up from the dead [as if we had to be saved by our own efforts, doing the impossible].” 8 But what does it say? “The word is near you, in your mouth and in your heart”—that is, the word [the message, the basis] of faith which we preach— 9 because if you acknowledge and confess with your mouth that Jesus is Lord [recognizing His power, authority, and majesty as God], and believe in your heart that God raised Him from the dead, you will be saved. 10 For with the heart a person believes [in Christ as Savior] resulting in his justification [that is, being made righteous—being freed of the guilt of sin and made acceptable to God]; and with the mouth he acknowledgesand confesses [his faith openly], resulting in and confirming [his] salvation. 11 For the Scripture says, “Whoever believes in Him [whoever adheres to, trusts in, and relies on Him] will not be disappointed [in his expectations].” 12 For there is no distinction between Jew and Gentile; for the same Lord is Lord over all [of us], and [He is] abounding in riches (blessings) for all who call on Him [in faith and prayer]. 13 For “whoever calls on the name of the Lord [in prayer] will be saved.”