'Separate' in the Bible

Nor speak let a son of the stranger, Who is joined unto Jehovah, saying: 'Jehovah doth certainly separate me from His people.' Nor say let the eunuch, 'Lo, I am a tree dried up,'

As for those who keep themselves separate, and make themselves clean in the gardens, going after one in the middle, taking pig's flesh for food, and other disgusting things, such as the mouse: their works and their thoughts will come to an end together, says the Lord.