Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: When the Prophet (peace and blessings be upon him) went to the toilet, I would bring him water in a vessel. He (peace and blessings be upon him) would clean himself, then rub his hand on the ground. Then I would bring him another vessel, and he (peace and blessings be upon him) would perform ablution with it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 520
Sayyiduna Jarir bin Abdullah (may Allah be pleased with him) said: I brought water to the Messenger of Allah (peace and blessings be upon him); he (peace and blessings be upon him) cleaned himself, then rubbed his hand on the ground, then performed ablution and wiped over his leather socks. I said: O Messenger of Allah, your feet? (that is, you did not wash your feet). He (peace and blessings be upon him) said: "I put them on after performing ablution."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 521
Abu Wahb said that he heard Sayyiduna Abu Hurayrah (may Allah be pleased with him) say: The Messenger of Allah (peace and blessings be upon him) said to me: "Help me with ablution." I brought him water; he (peace and blessings be upon him) cleaned himself, then put his hand into the earth and rubbed it, then he (peace and blessings be upon him) washed that hand and performed ablution, and also wiped over his leather socks. I said: You performed ablution and did not wash your feet? He (peace and blessings be upon him) said: "I put them on after performing ablution."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 522
It is narrated from Anas bin Sirin that water and ushnan (a soap-like plant) used to be placed for Sayyiduna Anas bin Malik (may Allah be pleased with him), that is, for cleaning himself after relieving himself.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 523