Yahya related to me from Malik from Zayd ibn Aslam that his father said, "Abdullah ibn al-Arqam said, Show me a riding-camel which the amir al-muminim can give me to use. I said, Yes. One of the sadaqa camels. Abdullah ibn al-Arqam said, Would you want a stout man on a hot day to wash for you what is under his lower garment and its folds, and then give it to you to drink? I was angry and said, May Allah forgive you! Why do you say such things to me? Abdullah ibn al-Arqam said, Sadaqa is the impurities of people which they wash off themselves.