Exodus 21:6 then his master shall bring him to God, and shall bring him to the door or to the doorpost, and his master shall bore his ear through with an awl, and he shall serve him for ever. (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)
Deuteronomy 15:17 then you shall take an awl, and thrust it through his ear to the door, and he shall be your servant forever. Also to your female servant you shall do likewise. (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)