Musnad Ahmad 1015:9

'Abd al-Razzaq narrated to us, from Ma'mar, from Qatadah, from Shahr ibn Hawshab, from 'Abd al-Rahman ibn Ghanam, that Abu Malik al-Ash'ari said to his people, and he mentioned the like of the hadith of Sa'id, except that he said: "And he washed his feet." And he said: "And he recited in the first two rak'ahs the Opening of the Book (al-Fatihah), and he let those who were behind him hear."