And those who believed (in the Oneness of Allah and His Messengers and whatever they brought) and did righteous deeds, will be made to enter Gardens under which rivers flow, - to dwell therein forever (i.e. in Paradise), with the permission of their Lord. Their greeting therein will be: Salam (peace!).

The greatest terror (on the Day of Resurrection) will not grieve them, and the angels will meet them, (with the greeting): "This is your Day which you were promised."

There is no restriction on the blind, nor any restriction on the lame, nor any restriction on the sick, nor on yourselves, if you eat from your houses, or the houses of your fathers, or the houses of your mothers, or the houses of your brothers, or the houses of your sisters, or the houses of your father's brothers, or the houses of your father's sisters, or the houses of your mother's brothers, or the houses of your mother's sisters, or (from that) whereof you hold keys, or (from the house) of a friend. No sin on you whether you eat together or apart. But when you enter the houses, greet one another with a greeting from Allah (i.e. say: As-Salamu 'Alaikum - peace be on you) blessed and good. Thus Allah makes clear the Ayat (these Verses or your religious symbols and signs, etc.) to you that you may understand.

Their greeting on the Day they shall meet Him will be "Salam: Peace (i.e. the angels will say to them: Salamu 'Alaikum)!" And He has prepared for them a generous reward (i.e. Paradise).

Allah sends His Salat (Graces, Honours, Blessings, Mercy, etc.) on the Prophet (Muhammad ﷺ) and also His angels too (ask Allah to bless and forgive him). O you who believe! Send your Salat on (ask Allah to bless) him (Muhammad ﷺ), and (you should) greet (salute) him with the Islamic way of greeting (salutation i.e. AsSalamu 'Alaikum).

Have you not seen those who were forbidden to hold secret counsels, and afterwards returned to that which they had been forbidden, and conspired together for sin and wrong doing and disobedience to the Messenger (Muhammad ﷺ). And when they come to you, they greet you with a greeting wherewith Allah greets you not, and say within themselves: "Why should Allah punish us not for what we say?" Hell will be sufficient for them, they will burn therein, and worst indeed is that destination!

When you are greeted with a greeting, greet in return with what is better than it, or (at least) return it equally. Certainly, Allah is Ever a Careful Account Taker of all things.