Abdullah ibn 'Umar (may Allah be pleased with him and his father) said that a man asked the Prophet (may Allah’s salah and salam be upon him) "Which deeds in Islam are best?" He replied, "To feed others and give salam to those you know and those you do not know."

There are three qualities—whoever possesses them has attained complete Iman: being just with oneself, spreading salam to all people, and giving in charity despite having limited means.

The Messenger of Allah (may Allah’s salah and salam be upon him) said, "You will not enter Paradise until you have Iman, and you will not truly have Iman until you love one another. Shall I not inform you of something which, if you do you will love one another? Spread salam among yourselves."