Matthew 19:6

19:6 So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.”

Matthew 13:49

13:49 It will be this way at the end of the age. Angels will come and separate the evil from the righteous

Matthew 25:32

25:32 All the nations will be assembled before him, and he will separate people one from another like a shepherd separates the sheep from the goats.