Genesis 2

Then God blessed the seventh day and made it holy, because on it he rested from all the work of creating that he had done.

The Lord God said, “It is not good for the man to be alone. I will make a helper suitable for him.”

Then the Lord God made a woman from the rib he had taken out of the man, and he brought her to the man. The man said, “This is now bone of my bones and flesh of my flesh; she shall be called ‘woman,’ for she was taken out of man.” That is why a man leaves his father and mother and is united to his wife, and they become one flesh.