It is narrated from Sayyiduna Bara’ (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: “Spread salam widely, you will remain safe.”
It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "You will not enter Paradise until you have faith, and you will not have faith until you love one another. Shall I tell you something which, if you do it, you will love one another?" They said: "O Messenger of Allah! Yes, indeed." He (peace and blessings be upon him) said: "Spread salam (greetings of peace) among yourselves."
Hadith Referenceالادب المفرد / كتاب السلام / 980
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : صحيح مسلم ، الإيمان ، ح : 54»
It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Worship the Most Merciful, feed (others), spread the greeting of peace, you will enter the gardens (of Paradise)."