Deuteronomy 23:15 in the King James Version
Thou shalt not deliver unto his master the servant which is escaped from his master unto thee:
Context
14 for the LORD your God walks in the middle of your camp, to deliver you, and to give up your enemies before you. Therefore your camp shall be holy, that he may not see an unclean thing in you, and turn away from you.
15 You shall not deliver to his master a servant who has escaped from his master to you.
16 He shall dwell with you, among you, in the place which he shall choose within one of your gates, where it pleases him best. You shall not oppress him.