The Apostle Paul commands in this case: “…If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.
And the woman which hath an husband that believeth not, and if he be pleased to dwell with her, let her not leave him” (I Corinthians -13).
For He knoweth our frame; He remembereth that we are dust” (Psalm 103:8, 14).
”If we confess our sins, He is faithful and just to forgive us our sins” (I John 1:9).
He reminded her accusers that they also were sinners and had no warrant to punish her.
Then He told the woman: He in no way condoned her sin, but He did forgive her sin, when she gave evidence of godly sorrow and determination not to sin again in this way.
First of all, the divine standard for marriage is lifelong commitment to one's spouse, and nothing else.This promise is specifically for Christians, and includes even the sin of adultery, if there is genuine repentance.