Mu'jam Kabir Tabarani 2528 — I said: O Messenger of Allah, I saw

Sayyidah Umm al-Fadl (may Allah be pleased with her) said: I said: O Messenger of Allah, I saw in a dream as though one of the parts of your body were in my house, or she said: in my room. He (peace and blessings be upon him) said: "If Allah wills, Fatimah will give birth to a boy, and you will raise him." She said: So Fatimah gave birth to Hasan, and he was given to me, and I suckled him with the milk of Qutham bin Abbas. She said: Then one day I brought him to the Prophet (peace and blessings be upon him), and he urinated on his chest, so I gave him a light push on his back. The Prophet (peace and blessings be upon him) said: "Gently, may Allah have mercy on you, you have hurt my son." I said: Give me your lower garment so that I may wash it. He (peace and blessings be upon him) said: "No, pour water over it, for water is poured over the urine of a boy, and the urine of a girl is washed."