Musnad Ahmad 1153:470

Ya'qub ibn Ibrahim narrated to us, my father narrated to us, from his father, that 'Urwah ibn al-Zubayr narrated to him, from 'Aishah, that the Messenger of Allah (peace and blessings of Allah be upon him) called his daughter Fatimah and whispered to her, so she wept. Then he whispered to her, and she laughed. 'Aishah said: I said to Fatimah, "What is this that the Messenger of Allah (peace and blessings of Allah be upon him) whispered to you, so you wept, then he whispered to you and you laughed?" She said: "He whispered to me and informed me of his death, so I wept. Then he whispered to me and informed me that I am the first of his family to follow him, so I laughed."