Something I found which I wrote back in 2014:

Some people in arguing for marrying multiple wives give the examples of Abraham, Jacob, David, or Solomon. Those who argue against polygyny say that the Bible only records their actions, it does not condone them. They say that since the Bible does not specifically say it is right, we are free to condemn it as much as we like.

And marrying multiple wives was not the only thing the Bible records David doing. David also tells the priest that he was sent by the king when he was actually fleeing for his life, and he eats the shewbread, which is expressly forbidden by the law.

If there is any point where a person could be sure that David’s example should not be followed, it would be when he did what was unlawful, by eating the shewbread.

Then Jesus says:
Have ye not read so much as this, what David did, when himself was an hungred, and they which were with him;
How he went into the house of God, and did take and eat the shewbread, and gave also to them that were with him; which it is not lawful to eat but for the priests alone?
Luke 6:3-4

Some say that Jesus can interpret how he likes because he is God. But he is not giving us new information, he is not explaining something to the Pharisees, he is rebuking them for not seeing what is clear in the scriptures.

He says “Have ye not read so much as this?”
Implying that something should have been obvious to us. Something he made clear, which we have no excuse for missing.

When we read what David did, Jesus expected us to not condemn his action, though it was expressly forbidden by the law, and not only that: he also expects us to take his action as a guide to our thinking.

This is far bolder than any claim made by advocates of polygyny, yet Jesus considers it obvious that we should have already been thinking this way.

In the place where those who condemn David would feel most sure of themselves, Jesus considers their thinking to be perfectly the opposite of what is clearly taught by the scripture.

Even though the scripture did not “condone” it, it simply said that David did it.

If you had been there when Jesus said this, what would you have said?

Many would have said, “The Bible only records David’s actions, it does not condone them. We cannot use David’s actions as a guide for our life or our understanding of the scriptures.”

The Pharisees would have loved that.