Mark 10:3 KJV

And he answered and said unto them, What did Moses command you?
Mark 10:3, King James Version

In context

2 And the Pharisees came to him, and asked him, Is it lawful for a man to put away his wife? tempting him.

3 And he answered and said unto them, What did Moses command you?

4 And they said, Moses suffered to write a bill of divorcement, and to put her away.