Abdullah bin al-Harith (may Allah have mercy on him) said: I met the Companions of the Prophet (peace and blessings be upon him) and asked them about the Duha (forenoon) prayer, but I found no one who would tell me about it, until I came to Umm Hani bint Abi Talib (may Allah be pleased with her) and asked her. She said: "The Messenger of Allah (peace and blessings be upon him) came to the house of Fatimah (may Allah be pleased with her) in Makkah on a Friday. He called for a handful of water and poured it, then took a bath, and Fatimah screened him. Then he (peace and blessings be upon him) prayed eight rak'ahs; he had never prayed them before that, nor after."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21398