‘Ikrima said that some people from al-‘Iraq came and asked Ibn ‘Abbas whether he considered bathing on Friday obligatory. He replied that, while not obligatory, it had a more cleansing effect and was better for the one who observed it; but if anyone did not bathe there was no obligation for him to do so. He then said that he would tell them how the practice of bathing on Friday began. The people were in difficult circumstances, their clothing being of wool and their work being the carrying of loads on their backs. Their mosques was rather small and had a low roof which was only made of trellis work. Allah's Messenger ﷺ came out one hot day when the people were sweating in their woollen garments to such an extent that they annoyed one another by the odours which were spread around. When Allah's Messenger ﷺ noticed those odours he said, “When this day comes, you people must wash, and each of you should apply the best grease and perfume you can find.” Ibn ‘Abbas added that when Allah afterwards brought prosperity, they wore clothes not made of wool, they did not need to do manual labour, their mosque was extended, and some of the annoyance caused to one another by the sweat came to an end. Abu Dawud transmitted it.