A love slave of Jesus

Exodus 21:2 (KJV) If thou buy an Hebrew servant, six years he shall serve: and in the seventh he shall go out free for nothing.
3 If he came in by himself, he shall go out by himself: if he were married, then his wife shall go out with him.
4 If his master have given him a wife, and she have born him sons or daughters; the wife and her children shall be her master's, and he shall go out by himself.
5 And if the servant shall plainly say, I love my master, my wife, and my children; I will not go out free:
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; and he shall serve him for ever.

Matthew Henry says this:

2. This law will be further useful to us, (1.) To illustrate the right God has to the children of believing parents, as such, and the place they have in his church. They are by baptism enrolled among his servants, because they are born in his house, for they are therefore born unto him, Eze. 16:20 . David owns himself God’s servant, as he was the son of his handmaid (Ps. 116:16 ), and therefore entitled to protection, Ps. 86:16 . (2.) To explain the obligation which the great Redeemer laid upon himself to prosecute the work of our salvation, for he says (Ps. 40:6 ), My ears hast thou opened, which seems to allude to this law. He loved his Father, and his captive spouse, and the children that were given him, and would not go out free from his undertaking, but engaged to serve in it for ever, Isa. 42:1, Isa. 42:4 . Much more reason have we thus to engage ourselves to serve God for ever; we have all the reason in the world to love our Master and his work, and to have our ears bored to his door-posts, as those who desire not to go out free from his service, but to be found more and more free to it, and in it, Ps. 84:10

Exodus 21 Commentary - Matthew Henry Commentary on the Whole Bible (Complete)

Romans 6:16-18 NIV

16 Don’t you know that when you offer yourselves to someone as obedient slaves, you are slaves of the one you obey—whether you are slaves to sin, which leads to death, or to obedience, which leads to righteousness?
17 But thanks be to God that, though you used to be slaves to sin, you have come to obey from your heart the pattern of teaching that has now claimed your allegiance.
18 You have been set free from sin and have become slaves to righteousness.