Exodus 21:6
Then his master shall bring him to the judges; he shall also bring him to the door, or to the door post; and his master shall bore his ear through with an awl; and he shall serve him for ever.
Torrey's Topical Textbook—AKJV

Deuteronomy 15:17
Then you shall take an awl, and thrust it through his ear to the door, and he shall be your servant for ever. And also to your maidservant you shall do likewise.
Torrey's Topical Textbook—AKJV