Musannaf Ibn Abi Shaybah 8022 — How many rakahs of Duha are prayed

Ibn Abi Layla said: I met the people while they were plentiful in number. No one told me about the Duha prayer except Sayyidah Umm Hani (may Allah be pleased with her); she told me that the Prophet (peace and blessings be upon him) prayed eight rak'ahs of the Duha prayer.