Kumbukumbu la Torati 15 : 17 Deuteronomy chapter 15 verse 17

ndipo utwae uma, uupenyeze katika sikio lake uingie katika ubao wa mlango, naye atakuwa mtumishi wako milele. Na kijakazi chako naye mfanye vivyo.
soma Mlango wa 15

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 maid-servant you shall do likewise.