This article considers the Old Testament data on the topic of divorce and remarriage. The author establishes that marriage is a covenant. From there it discusses the OT data on marriage breakup, whether through adultery or marriages ended by an excommunication by death. It examines Deuteronomy 24:1-4, the only place where a bill of divorce is mentioned. It also considers marriage and divorce in post-exilic Israel.
Adultery is a very serious matter. Why? This article gives six reasons.