Deuteronomy 23:8

(8) The children that are begotten of them From this passage it is clear that it was not only from Egypt that a “mixed multitude” came up with Israel. It seems to have been impossible to prevent some inter-marriages between Edom, Moab, and Israel when the Israelites passed through their land. Such a precept is suitable to the circumstances of Moses’ time. It would be less necessary when the bulk of the people had gone over the Jordan and left Moab and Edom far behind.