‏الزهد والرقائق‏ : Hadeeth No:7122 Shaqiq reported that it was said to Usama b. Zaid: Why don't you visit 'Uthman and talk to him? Thereupon he said: Do you think that I have not talked to him but that I have made you hear? By Allaah. I have talked to him (about things) concerning me and him and I did not like to divulge those things...

‏فضائل الصحابة‏ : Hadeeth No:6074 Al-Bari' b. 'Azib reported: I heard Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Hassan b. Thibit, write satire (against the non-believers) ; Gabriel is with you. This hadith has been narrated on the authority of Shu'ba with the same chain of transmitters....