Sayyiduna Anas (may Allah be pleased with him) said: At the walimah of Sayyidah Umm Salamah (may Allah be pleased with her), the Prophet (peace and blessings be upon him) served dates and ghee. (Allamah al-Haythami says:) I say that in the Sahih it is reported that this happened at the walimah of Sayyidah Safiyyah (may Allah be pleased with her), whereas here it is mentioned that it happened at the walimah of Sayyidah Umm Salamah (may Allah be pleased with her).
Al-Tabarani recorded it in al-Mu'jam al-Awsat, and its narrators are thiqat (trustworthy).