Muhammad bin Rafa'i محمد بن رافع · The Book of Marriage

"Aishah said: 'The Messenger of Allah married me when I was nine and I lived with him for nine years.'"

It was narrated from Ibn 'Umar that the Messenger of Allah forbade Ash-Shighar. Ash-Shighar means when a man marries his daughter to another man, on the condition that that man marries his daughter to him, and no dowry is exchanged between them.

(Another chain) with a similar narration.