Narrated Anas (rad):

Whenever Allah’s Messenger (ﷺ) went to the privy, a servant and I used to carry a skin water container and a spear, and he would cleanse himself with the water. [Agreed upon].

وَعَنْهُ قَالَ: { كَانَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-يَدْخُلُ اَلْخَلَاءَ, فَأَحْمِلُ أَنَا وَغُلَامٌ نَحْوِي إِدَاوَةً مِنْ مَاءٍ وَعَنَزَةً, فَيَسْتَنْجِي بِالْمَاءِ } مُتَّفَقٌ عَلَيْه ِ [1]‏ .‏