Jeremiah
Jeremiah 3:20ESV·traditional attribution

Surely, as a treacherous wife leaves her husband, so have you been treacherous to me, O house of Israel, declares the LORD.’”

John Calvin Reformed @genevareformer

He confirms the first clause of the preceding verse: for he had said that it could hardly be that the Jews would recover what they had lost, and be formed again a new people; and he shews the reason, — because they were like an adulteress, as he had before stated.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The charge God exhibits against Israel for their treacherous departures from him, Jer 3:20. As an adulterous wife elopes from her husband, so have they gone a whoring from God. They were joined to God by a marriage-covenant, but they broke that covenant, they dealt treacherously with God, who had always dealt kindly and faithfully with them.

Commenting on Jeremiah 3:20-25

John Gill Reformed Baptist @doctorgill

Surely as a wife treacherously departeth from her husband,.... Or, "her friend" (i); who loves her, takes care of her, and provides for her, and goes after another man, and cohabits with him; which is a violation of the marriage covenant, and acting a base and treacherous part unto him to whom she is married so have you dealt treacherously with me, O house of...