So the LORD God caused a deep sleep to fall upon the man, and while he slept took one of his ribs and closed up its place with flesh;
 and the rib which the LORD God had taken from the man he made into a woman and brought her to the man.
 Then the man said, "This at last is bone of my bones
and flesh of my flesh;
she shall be called Woman,
because she was taken out of Man."
 Therefore a man leaves his father and his mother and cleaves to his wife, and they become one flesh.
- Genesis , The Bible