‏الحج : Hadeeth No:3228 Ibn 'Umar had narrated this hadith through another chain of transmitters....

‏البر والصلة والآداب‏ : Hadeeth No:6263 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: When two persons indulge in hurling (abuses) upon one another, it would be the first one who would be the sinner so long as the oppressed does not transgress the limits....