Musnad Ahmad 1156:148

Rawh narrated to us, he said: Ibn Jurayj narrated to us, he said: Habib ibn Abi Thabit informed me that Abd al-Hamid ibn Abd Allah ibn Abi Amr and al-Qasim ibn Muhammad ibn Abd al-Rahman ibn al-Harith informed him that they heard Abu Bakr ibn Abd al-Rahman ibn al-Harith ibn Hisham, That Umm Salamah, the wife of the Prophet, may Allah bless him and grant him peace, informed him. He mentioned the hadith, except that he said: She said: "So I placed my grinding stone, and I brought out some grains of barley."