Musnad Ahmad 1153:2031

'Abdah narrated to us, he said: Muhammad ibn Ishaq narrated to us, from Fatimah bint Muhammad, from 'Amrah, from 'Aishah, she said: "We did not know of the burial of the Messenger of Allah, may Allah bless him and grant him peace, until we heard the sound of the shovels at the end of the night, on the night of Wednesday." Ibn Ishaq said: And the *masahi* (shovels) are the *murur* (spades/mattocks).