The Messenger of Allah ﷺ went out for relieving himself. Mughira went with him carrying a jug full of water. When he (the Holy Prophet) came back after relieving himself, he poured water over him and he performed ablution and wiped over his socks; and in the narration of Ibn Rumh there is" till" instead of" when".  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ خَرَجَ لِحَاجَتِهِ فَاتَّبَعَهُ الْمُغِيرَةُ بِإِدَاوَةٍ فِيهَا مَاءٌ فَصَبَّ عَلَيْهِ حِينَ فَرَغَ مِنْ حَاجَتِهِ فَتَوَضَّأَ وَمَسَحَ عَلَى الْخُفَّيْنِ وَفِي رِوَايَةِ ابْنِ رُمْحٍ مَكَانَ حِينَ حَتَّى  

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.  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ خَرَجَ لِحَاجَتِهِ فَاتَّبَعَهُ الْمُغِيرَةُ بِإِدَاوَةٍ فِيهَا مَاءٌ فَصَبَّ عَلَيْهِ حَتَّى فَرَغَ مِنْ حَاجَتِهِ فَتَوَضَّأَ وَمَسَحَ عَلَى الْخُفَّيْنِ  

The Messenger of Allah went out to relieve himself, and Mughirah followed him with a vessel of water. When he finished relieving himself, he performed ablution and wiped over his leather socks.  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ خَرَجَ لِحَاجَتِهِ فَاتَّبَعَهُ الْمُغِيرَةُ بِإِدَاوَةٍ فِيهَا مَاءٌ حَتَّى فَرَغَ مِنْ حَاجَتِهِ فَتَوَضَّأَ وَمَسَحَ عَلَى الْخُفَّيْنِ  

Once Messenger of Allah ﷺ went out to answer the call of nature and I followed him with a tumbler containing water, and when he finished, I poured water and he performed ablution and passed wet hands over his Khuffs (socks made from thick fabric or leather). (Using translation from Bukhārī 203)  

عَنْ رَسُولِ اللهِ ﷺ أَنَّهُ خَرَجَ لِحَاجَتِهِ وَتَبِعَهُ الْمُغِيرَةُ بِالْإِدَاوَةِ فِيهَا مَاءٌ فَصَبَّ عَلَيْهِ حَتَّى فَرَغَ مِنْ حَاجَتِهِ «فَتَوَضَّأَ وَمَسَحَ عَلَى الْخُفَّيْنِ»  

Once Messenger of Allah ﷺ went out to answer the call of nature and I followed him with a tumbler containing water, and when he finished, I poured water and he performed ablution and passed wet hands over his Khuffs (socks made from thick fabric or leather). (Using translation from Bukhārī 203)  

عَنْ رَسُولِ اللهِ ﷺ أَنَّهُ خَرَجَ لِحَاجَتِهِ فَأَتْبَعَهُ الْمُغِيرَةُ بِإِدَاوَةٍ فِيهَا مَاءٌ «فَصَبَّ عَلَيْهِ حِينَ فَرَغَ مِنْ حَاجَتِهِ فَتَوَضَّأَ وَمَسَحَ عَلَى خُفَّيْهِ»  

[Machine] "From the Messenger of Allah, ﷺ , that he went out to attend to his need and Al-Mughirah followed him with a container of water. He poured it on him when he finished attending to his need, then he performed ablution and wiped over his socks."  

عَنْ رَسُولِ اللهِ ﷺ أَنَّهُ خَرَجَ لِحَاجَتِهِ فَاتَّبَعَهُ الْمُغِيرَةُ بِإِدَاوَةٍ فِيهَا مَاءٌ فَصَبَّ عَلَيْهِ حِينَ فَرَغَ مِنْ حَاجَتِهِ فَتَوَضَّأَ وَمَسَحَ عَلَى خُفَّيْهِ