Usama ibn Zayd related that one day the Prophet, may Allah bless
him and grant him peace, was riding on a donkey on a straw saddle covered
by a blanket from Fadak. Usama ibn Zayd was riding behind him. He was on
his way to visit Sa'd ibn 'Ubada. He passed by a meeting which included
'Abdullah ibn Ubayy ibn Salul - before the enemy of Allah had become
Muslim. The gathering contained a mixture of Muslims, associaters and idolaters.
He greeted them.