It is narrated from Sayyidah Umm Hakim bint al-Zubayr (may Allah be pleased with her) that she handed the Prophet (peace and blessings be upon him) a shoulder of meat. He (peace and blessings be upon him) ate some of it, then prayed.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21677