Musnad Ahmad 1153:749

Surayj narrated to us, he said: Ibn Abi al-Zinad narrated to us, from Hisham ibn Urwah, from his father, from Aisha, that she said: "O son of my sister, the Messenger of Allah, peace and blessings of Allah be upon him, said to me: 'O Aisha, do not count, lest Allah count against you.'"