It is narrated from Sayyiduna Suwaid bin Nu'man that in the year of the conquest of Khaybar, we set out with the Prophet ( صلی اللہ علیہ وسلم ). When we reached the place of Sahba, the Prophet ( صلی اللہ علیہ وسلم ) had already led the Asr prayer. Then food was requested, but only sattu (roasted barley flour) could be presented. The people ate that and drank water over it. Then they rinsed their mouths with water, and the Prophet ( صلی اللہ علیہ وسلم ) led them in prayer while standing.