Exodus 21:6 - Then his master shall bring him unto the judges; he shall also bring him to the door, or unto the door post; and his master shall bore his ear through with an aul; H4836 and he shall serve him for ever.
Deuteronomy 15:17 - Then thou shalt take an aul, H4836 and thrust it through his ear unto the door, and he shall be thy servant for ever. And also unto thy maidservant thou shalt do likewise.