Also, using the quoted slavery scripture for just one example, for how to hear God's voice in reading scripture . . .
Yes, it does not say to punish a slave owner if his slave dies of a beating more than a day after the beating.
We see how we can be tempted to judge this and criticize this.
But we need to be humble in how we evaluate and understand what God says. So, I can see this rule is a set-up to help us learn how to be humble in how we read and understand God's word. God knows ones would make themselves the judges of His word; and He knows how ones would love to punish the man; so He has things in His word, to resist how prideful people are. "It is an opening to show that God would rather have people learn how to love, than only punish people who do what is wrong."
The "missing punishment" shows that God has something better in mind . . . how Jesus would take all our punishments on Himself, rather than hurt us and make us suffer and die for our sins.
I am not God's judge!! There are those with a double standard. They say it is ok to kill an unborn person, yet they make a big stink about a man killing a slave child or slave woman and not being punished.
And then, on top of this, ones will say God is unfair and unkind. This is not coming from God's voice.
There are plenty of sins which are not named in the early scriptures. There are therefore no punishments given for these sins. For example, arguing (Philippians 2:14) is not named as a sin to be punished. Gossip can be very harmful and cruel; yet, gossip is not named with a punishment, in the early scriptures. Yet, arguing and gossip can be more destructive than death, because it can cause harm worse than only your body dying. But there is no punishment in the Old Testament for arguing or gossip.
So, the fact that a wrong thing does not have a punishment in the Bible does not mean it is ok to do that wrong thing. Like this, then, even if a wrong thing does not have a punishment for it, this does not mean God is ok with that wrong thing.
Our example of not punishing a man for killing a slave is possibly such an example.
It is wrong, yes, but no punishment for it does not mean it is ok. There is always a built-in punishment for any sin, actually. In such a case, the person loses a slave which he paid for. Also, he loses out by not having self-control. He will suffer in his relationships with family members and friends, because of his bad self-control.
But punishing him will not make him become real in love. Ones reading this commandment can realize that God is showing that punishment is not enough. If one will be allowed to not be punished, this means others in his family and community are needed to help him in a family way of relating, to help him find out how to love. This can be done before he gets to the point of killing a slave. Others can hear this rule and realize they need to help each other, in order to prevent such a thing from happening.
So, like with this commandment, we need to hear the voice of love and humility in how we understand each commandment
And this manner of approaching God's word can help us in how to deal with things of our lives. Hear His voice of compassion, first, with humility. And seek how we can handle things best in a family caring and sharing approach with wrong things and wrong people . . . so that our example can help to win wrong people to our Father's family caring and sharing and forgiving way of taking care of problems.