Matthew 5:27
Adultery
5:27 “You have heard that it was said, ‘Do not commit adultery.’ 1
Matthew 5:32
5:32 But I say to you that everyone who divorces his wife, except for immorality, makes her commit adultery, and whoever marries a divorced woman commits adultery.
Matthew 19:18
19:18 “Which ones?” he asked. Jesus replied, “Do not murder, do not commit adultery, do not steal, do not give false testimony,
1 sn A quotation from Exod 20:14; Deut 5:17.