‏البر والصلة والآداب‏ : Hadeeth No:6359 Abu Dharr reported: Allaah's Prophet (sallAllaahu alayhi wa sallam) said to me: Don't consider anything insignificant out of good things even if it is that you meet your brother with a cheerful countenance....

‏صفات المنافقين وأحكامهم‏ : Hadeeth No:6683 This hadith has been narrated on the authority of 'Abdullah through another chain of transmitters....