It was to be otherwise with the Edomite and the Egyptian; though the former had refused permission to the Israelites to pass through their land, and the latter had oppressed and wronged the nation, yet as the former were connected with Israel by a bond of kindred—for he is thy brother—and the latter had received Israel to sojourn in their land, where, notwithstanding the oppression which clouded the later times of their sojourn, they had reaped many benefits, they were not to abhor these nations or place them under a ban of perpetual exclusion; descendants in the third generation of an Edomite or Egyptian might be naturalized in Israel.
Deuteronomy 23:9-11—When the people went forth to war, all impurity and defilement was to be kept out of their camp. When the host goeth forth; literally, when thou goest forth as a camp or host. As in the wilderness the camp was to be kept pure (Numbers 5:2, etc.), so also in the future, when they went out to war, all defilement was to be removed from their host. Every wicked thing; rather, every evil thing, evil in the sense of blemish or uncleanness (cf. Deuteronomy 17:1).