Sahih Muslim 243
Jabir reported: 'Umar b. Khattab said that a person performed ablution and left a small part equal to the space of a nail (unwashed). The Apostle of Allah ﷺ saw that and said: Go back and perform ablution well. He then went back (performed ablution well) and offered the prayer.
حَدَّثَنِي سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحَسَنُ بْنُ مُحَمَّدِ بْنِ أَعْيَنَ، حَدَّثَنَا مَعْقِلٌ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، أَخْبَرَنِي عُمَرُ بْنُ الْخَطَّابِ، أَنَّ رَجُلاً، تَوَضَّأَ فَتَرَكَ مَوْضِعَ ظُفُرٍ عَلَى قَدَمِهِ فَأَبْصَرَهُ النَّبِيُّ ﷺ فَقَالَ
" ارْجِعْ فَأَحْسِنْ وُضُوءَكَ " . فَرَجَعَ ثُمَّ صَلَّى .
Classification
Sahih (Authentic)
References
Sahih Muslim 243
Sahih Muslim Vol. 1, Book of Purification, Hadith 474