Nehemiah 9:2; Nehemiah 10:28; Nehemiah 13:3

2 The descendants of Israel separated themselves from all foreigners , and stood and confessed their sins and the iniquities of their fathers.

28 Now the rest of the people, the priests, the Levites, the gatekeepers, the singers, the temple servants and all those who had separated themselves from the peoples of the lands to the law of God, their wives, their sons and their daughters, all those who had knowledge and understanding,

3 So when they heard the law, they excluded all foreigners from Israel.