Bulugh al-Maram
Bulugh al-Maram 55
وَعَنْ أَنَسٍ - رضى الله عنه - قَالَ: { رَأَى اَلنَّبِيُّ - صلى الله عليه وسلم -رَجُلًا, وَفِي قَدَمِهِ مِثْلُ اَلظُّفْرِ لَمْ يُصِبْهُ اَلْمَاءُ. فَقَالَ: "اِرْجِعْ فَأَحْسِنْ وُضُوءَكَ" } أَخْرَجَهُ أَبُو دَاوُدَ, وَالنَّسَائِيّ ُ 1 .1 - صحيح. رواه أبو داود (173). ووهم الحافظ -رحمه الله- في عزوه للنسائي، إذا لم يروه لا في "الكبرى" ولا في "الصغرى" والله أعلم.
Anas (may Allah be pleased with him) reported: The Prophet (peace and blessings be upon him) saw a man with a spot on his foot the size of a fingernail that had not been touched by water. He said: ‘Go back and perform your ablution well.’ Abu Dawud reported it. (1)
(1) Authentic. Reported by Abu Dawud (173). Al-Hafiz (may Allah have mercy on him) erred in attributing it to al-Nasa’i, for he did not report it in either al-Kubra or al-Sughra. And Allah knows best.
Translation notes
The Sunnah.com witness attributes the hadith to both Abu Dawud and al-Nasa’i; the Arabic annotation says the al-Nasa’i attribution is an error.