Exodus 21:5-6

21:5 But if the servant should declare, ‘I love my master, my wife, and my children; I will not go out free,’ 21:6 then his master must bring him to the judges, and he will bring him to the door or the doorposts, and his master will pierce his ear with an awl, and he shall serve him forever.

Psalms 40:6

40:6 Receiving sacrifices and offerings are not your primary concern.

You make that quite clear to me!

You do not ask for burnt sacrifices and sin offerings.

Psalms 40:8

40:8 I want to do what pleases you, my God.

Your law dominates my thoughts.”