Jami` at-Tirmidhi 93

Hammam bin AI-Harith narrated:"Jarir bin Abdullah urinated, then he performed Wudu, wiping over his Khuff. So he was asked, 'You do this?' He replied, 'What prevents me, when I have seen Allah's Messenger doing it?" He [Ibrahim] said "And they were impressed by the narration of Jarir since he accepted Islam after the revelation Sural Al-Ma'idah." [This is the saying of lbrahim, that is, "They were impressed."] [He said:] There are narrations on this topic from Umar, Ali, Hudhaifah, AI-Mughirah, Bilil, Sa'd, Abu Ayyub, Salman, Buraidah, Amr bin Umayyah, Anas, Sahl bin Sa'd, Ya'la bin Murrah, Ubadah bin As-Samit, Usamah bin Shank, Abu Umamah, Jabir, Usamah bin Zaid, and Ibn Ubadah. They call him Ibn Imarah and Ubayy bin Imarah