Abd al-Rahman bin Abi Layla narrates: No one told us that he had seen the Prophet (peace and blessings be upon him) praying the Duha (forenoon) prayer except Sayyidah Umm Hani (may Allah be pleased with her), for she mentioned that on the day of the Conquest of Makkah he (peace and blessings be upon him) performed the ritual bath (ghusl) in her house, then prayed eight rak'ahs. I never saw him (peace and blessings be upon him) offer a prayer lighter than it, except that he (peace and blessings be upon him) completed its bowing (ruku') and prostrations.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21434