Musnad Ahmad 1156:183

Isma'il ibn Muhammad narrated to us, Mu'adh ibn Mu'adh narrated to us, he said: Muhammad ibn 'Amr narrated to us, 'Umar ibn Muslim ibn 'Ammar ibn Akimah narrated to us, he said: I heard Sa'id ibn al-Musayyib, he said: I heard Umm Salamah, and he mentioned the hadith.