Sahih Muslim 847
Sahih Muslim · Book 7: The Book of Prayer - Friday · Ghusl on Friday is obligatory for all adult men, and clarifying what they were ordered regarding it
'Aisha reported:
وَحَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ ، أَخْبَرَنَا اللَّيْثُ ، عَنْ يَحْيَى بْنِ سَعِيدٍ ، عَنْ عَمْرَةَ ، عَنْ عَائِشَةَ ، أَنَّهَا قَالَتْ كَانَ النَّاسُ أَهْلَ عَمَلٍ وَلَمْ يَكُنْ لَهُمْ كُفَاةٌ فَكَانُوا يَكُونُ لَهُمْ تَفَلٌ فَقِيلَ لَهُمْ لَوِ اغْتَسَلْتُمْ يَوْمَ الْجُمُعَةِ .
The people (mostly) were workers and they had no servants. Ill-smell thus emitted out of them. It was said to them: Were you to take bath on Friday.