‏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....

‏الفضائل : Hadeeth No:5717 This hadith has been transmitted on the authority of Anas with a slight variation of wording....