A person asked the prophet "Who is the most deserving of my companionship" and the prophet said "Your mother".
The person asked again "who is the most deserving of my companion ship", the prophet responded again "Your mother", then again he asked "Who is the most deserving of my companion ship", he said "Your mother".
He asked one more time "Who is the most deserving of my companion ship", the prophet responded "your father.
The reason why is that childbirth and having the baby in the womb for 9 months are very exhausting parts of childbirth, and then labour and then childbirth.