Sahih Muslim, 3104

Rapporté par Usama b. Zaid رضي الله عنه : Il était assis derrière le Messager d’Allah ﷺ sur sa monture alors qu’il revenait de ‘Arafa. En arrivant dans la vallée, il a arrêté sa monture, est allé à l’écart pour uriner. À son retour, j’ai versé de l’eau d’une cruche sur lui et il a fait ses ablutions, puis il est remonté jusqu’à Muzdalifa où il a réuni les prières du coucher du soleil et de ‘Isha

Usama b. Zaid (Allah be pleased with him) reported that he sat behind Allah's Messenger (ﷺ) on his ride as he came back from 'Arafa. And as he came to the valley, he halted his camel, and then went to the wilderness (to urinate). And when he came back, I poured water on him from the jug and he performed ablution, and then rode on until he came to Muzdalifa and there he combined the sunset and 'Isha' prayers