Musnad Ahmad 5:239

'Affan and Hasan ibn Musa narrated to us, they said: Hammad ibn Salamah narrated to us, from 'Abdullah ibn Muhammad ibn 'Aqil, he said: 'Affan said: 'Abdullah ibn Muhammad ibn 'Aqil narrated to us, from Muhammad ibn 'Ali ibn al-Hanafiyyah, from his father, "That the Prophet, may Allah bless him and grant him peace, was shrouded in seven garments."