The Messenger of Allah ﷺ went in to relieve himself, so I brought him a vessel of water and he washed himself with it. Then he rubbed his hand on the ground and washed it. Then I brought him another vessel, and he performed wudu with it.
قال أبي قال أسود يعني شاذان في هذا الحديث إذا دخل الخلاء أتيته بماء في تور أو في ركوة وذكره بإسناده