Riyad us-Salihin Hadith 528

Seven, eight or nine people, including myself, were with Messenger of Allah (ﷺ) on an occasion when he (ﷺ) remarked, "Would you pledge allegiance to Messenger of Allah?" As we had taken oath of allegiance shortly before, we said, "We have already done so, O Messenger of Allah." He again asked, "Would you not pledge allegiance to Messenger of Allah?" So we stretched out our hands and said, "We have already made our pledge with you, O Messenger of Allah, on what should we make a pledge with you?" He said, "To worship Allah and not to associate anything with Him, to perform the five (daily) Salat and to obey." Then he added in a low tone, "And not to ask people for anything." Thereafter, I noticed that some of these people who were present did not ask anyone to pick up even the whip for them if it fell from their hands. [Muslim].