Musnad Ahmad 1153:1114

Mu'adh ibn Hisham narrated to us, my father narrated to me, from Qatadah, from Kathir ibn Abi Kathir, from Abu 'Iyad, from 'Aishah, that she said: "The Prophet of Allah, peace and blessings of Allah be upon him, used to pray while some of his garment (mirṭ) was upon me."