"‏ أَيُّهَا النَّاسُ إِذَا كَانَ هَذَا الْيَوْمُ فَاغْتَسِلُوا وَلْيَمَسَّ أَحَدُكُمْ أَفْضَلَ مَا يَجِدُ مِنْ دُهْنِهِ وَطِيبِهِ ‏"

Some people of Iraq came and said: Ibn 'Abbas, do you regard taking a bath on Friday as obligatory ? He said: No, it is only a means of cleanliness, and is better for one who washes oneself. Anyone who does not take a bath, it is not essential for him. I inform you how the bath (on Friday) commenced. The people were poor and used to wear woolen clothes, and would carry loads on their backs. Their mosque was small and its rood was lowered down. It was a sort of trellis of vine. The Messenger of Allah (ﷺ) once came out on a hot day and the people perspired profusely in the woolen clothes so much so that foul smell emitted from them and it caused trouble to each other. When the Messenger of Allah (ﷺ) found the foul smell, he said: O people, when this day (Friday) comes, you should take bath and every one should anoint the best oil and perfume one has. Ibn 'Abbas then said: Then Allah, the Exalted, provided wealth (to the people) and they wore clothes other than the woolen, and were spared from work, and their mosque became vast. The foul smell that caused trouble to them became non-existent.