her former husband, who sent her away may not take her again to be his wife, after she has been made unclean, for that is an abomination before Yahweh; and you must not cause the land to sin that Yahweh your God gives you for an inheritance. Bible

“after she has been made unclean.” Sexual intercourse made a person ritually unclean.

Commentary for: Deuteronomy 24:4