It is narrated from Sayyiduna Abdullah (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) said: «سلام» is the name of Allah, which He has sent down to the earth, so spread it among yourselves. When a Muslim man passes by a group and greets them with salam, and they reply to his salam, then the one who greeted has superiority over them. And if they do not reply, then such (beings) reply to him who are better and purer than them.