From Matthew 19 (ESV)
“Why then,” they asked, “did Moses command that a man give his wife a certificate of divorce and send her away?”
Jesus replied, “Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning.
"They" asked..."why did Moses command that a man give his wife a certificate of divorce and send her away?"
I believe that what Moses commanded is that IF a man is going to send his wife away, then he must give her a certificate of divorce to leave with, so that she could legally marry again.
Moses did not command a man to divorce - he regulated divorce.
As Jesus corrected "them" - Moses allowed divorce, not command it.
It reminded me of Eve in the garden - She changed the command of God ever-so-slightly from "don't eat" to "don't even touch"
What I'm taking away today is that when God gives a command...follow it.
Adding to the Law doesn't make us more holy...it just gives us more chances to mess up.