'Separated' in the Bible

Those truly of Israelite descent separated from all the foreigners, standing and confessing their sins and the iniquities of their ancestors.

"Now the rest of the people -- the priests, the Levites, the gatekeepers, the singers, the temple attendants, and all those who have separated themselves from the neighboring peoples because of the law of God, along with their wives, their sons, and their daughters, all of whom are able to understand --