the Prophet prayed in a Khamisa (a square garment) having marks. During the prayer, he looked at its marks. So when he finished the prayer he said, "Take this Khamisa of mine to Abu Jahm and get me his Inbijaniya (a woolen garment without marks) as it (the Khamisa) has diverted my attention from the prayer."
Imam al-Reza (A.S.) to 'Abd al- Azim al-Hasani: O 'Abd al 'Azim! send my regards to my friends and tell them not to be tempted by Satan; and instruct them to be truthful and trustful, recommend them to be silent and refrain from useless discussions and arguments and to be close to each other and to visit each other because that would make them close to me, they should not be busy in annihilating each other; because I have sworn that whoever would do that and would make one of my friends angry I would request Allah to punish him in this world very severely and would be among the losers in the hereafter. Tell them that the Beneficent Allah has forgiven their sins, except the sins of those who were polytheist, or persecute one of my friends or would have bad intentions in regard to him. In these cases Allah would not forgive him unless he would repent and stop doing evil actions. If he would not repent, he would become faithless and would lose our friendship and love. I take refuge in Allah, against that! Source :Ahl al-Bayt (A.S.) in The Qur'an and HadithBy: Muhammadi Rayshahri.
*Abu Darda reported that he heard Allah's Messenger (s.a.w) saying:
He who supplicates for his brother behind his back (in his absence), the Angel commissioned (for carrying supplication to his Lord) says: Ameen, and it is for you also. (Muslim)
