Exodus 21:6 Then his master shall bring him unto the judges; he shall also bring him to his door, or unto the door post; and his master shall bore his ear through with an awl; and he shall serve him forever.
Deuteronomy 15:17 Then thou shalt take an awl, and thrust it through his ear unto the door, and he shall be thy servant forever. And also unto thy maidservant thou shalt do likewise.