Sunan an-Nasa'i 124
سنن النسائي#124Sahihأَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا اللَّيْثُ بْنُ سَعْدٍ، عَنْ يَحْيَى، عَنْ سَعْدِ بْنِ إِبْرَاهِيمَ، عَنْ نَافِعِ بْنِ جُبَيْرٍ، عَنْ عُرْوَةَ بْنِ الْمُغِيرَةِ، عَنْ أَبِيهِ الْمُغِيرَةِ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ خَرَجَ لِحَاجَتِهِ فَاتَّبَعَهُ الْمُغِيرَةُ بِإِدَاوَةٍ فِيهَا مَاءٌ فَصَبَّ عَلَيْهِ حَتَّى فَرَغَ مِنْ حَاجَتِهِ فَتَوَضَّأَ وَمَسَحَ عَلَى الْخُفَّيْنِ .
It was narrated from Al-Mughirah bin Shu'bah that the Messenger of Allah (ﷺ) went out to relieve himself, and Al-Mughirah followed him, (carrying) a vessel of water. He poured water for him when he had finished relieving himself, and he performed Wudu' and wiped over his Khuffs
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 1:124