Sayyiduna Itban bin Malik (may Allah be pleased with him) says: the Prophet (peace and blessings be upon him) offered the voluntary Duha prayer in his house.
(Allamah al-Haythami says:) I say: A hadith from Sayyiduna Itban (may Allah be pleased with him) is recorded in the Sahih, other than this hadith.
Ahmad recorded it, and its narrators are the narrators of the Sahih.