The Prophet Muhammad (peace be upon him) said: "Beware of suspicion, for suspicion is the worst of false tales; and do not look for faults in others, and do not spy, and do not be jealous of one another, and do not desert (cut your relations with) one another, and do not hate one another; and O God's worshipers! Be Brothers (as God has ordered you)!"
[Al-Bukhari]