Sahih Muslim
The Book Pertaining to Piety and Softening of Hearts (Kitab Al-Zuhd wa Al-Raqaiq)
Book Number: 042 / Hadith Number: 7123
Abu Wa'il reported: I was in the company of Usama b. Zaid that a person said: What prevents you to visit Uthman and talk to him for what he does? The rest of the hadith is the same.