سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 142
The Book of Purification
The Command To Do Wudu' Properly [1]
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ هِلاَلِ بْنِ يِسَافٍ، عَنْ أَبِي يَحْيَى، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَسْبِغُوا الْوُضُوءَ .
It was narrated that 'Abdullah bin 'Amr said: "The Messenger of Allah (ﷺ) said: 'Do Wudu' properly.'" [1] [1] Isbighu Al-Wudu'. And this narration supports the claim that some of them used this expression to mean "three times" for each limb, rather than "properly."
Sunan an-Nasa'i, 142Sahih (Darussalam)