Hammam (may Allah have mercy on him) says: (a) Sayyiduna Jarir (may Allah be pleased with him) urinated, then performed ablution and wiped over his leather socks. It was said to him: You do this even though you have urinated? He said: "Yes! I saw the Messenger of Allah (peace and blessings be upon him); he (peace and blessings be upon him) urinated, then performed ablution and wiped over his leather socks." Ibrahim (may Allah have mercy on him) said: This hadith pleased them, because Sayyiduna Jarir (may Allah be pleased with him) accepted Islam after the revelation of Surah al-Ma'idah.
(b) It is narrated from Sayyiduna Jarir bin Abdullah (may Allah be pleased with him) that he urinated, then performed ablution and wiped over his leather socks. We said to him: What is this that you have done? He said: "I saw the Messenger of Allah (peace and blessings be upon him); he (peace and blessings be upon him) did just as I have done."
(c) Imam al-Bukhari (may Allah have mercy on him) recorded this narration from al-A'mash (may Allah have mercy on him) through another chain.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 556