‏الزهد والرقائق‏ : Hadeeth No: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....

‏الصيام : Hadeeth No:2611 Abu Haraira (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The most excellent fast after Ramadan is God's month. al-Muharram, and the most excellent prayer after what is prescribed is prayer during the night....