5:11-31 This detailed test for adultery, a “trial by ordeal,” is the only such case found in the Old Testament, though trial by ordeal was a common procedure in the ancient Near East. God had a special interest in safeguarding marriage as the foundation of Hebrew society, and the purpose of this ordeal was to promote marital faithfulness. We cannot determine how commonly such ordeals actually occurred. This procedure appealed to God’s own intervention to ensure justice in cases lacking evidence (cp. 1 Cor 5:5).

5:1-4 Modern Westerners find the need for ceremonial or ritual purity difficult to understand. Westerners view skin diseases, bodily discharge, and contact with corpses as concerns of health and hygiene, but the primary issue in the Old Testament is guarding God’s holiness against ceremonial uncleanness (see Lev 11–15). The community had to safeguard the holiness of the camp so that unclean things or people did not ceremonially defile things associated with the Lord (Num 5:2-3). The community had to choose between having God in the camp or letting a defiled person remain in the camp, because both could not remain (5:3). • The importance of purity extends from Leviticus and Numbers to the book of Revelation: All that is ceremonially unclean will be forbidden to enter the New Jerusalem where God resides (see study note on Rev 21:27). In the New Testament, however, impurity is limited to what is morally impure (Acts 10:28; Eph 5:5; 1 Thes 2:3; 4:7).