What is the best greeting, meaning the saying of Allah the Exalted: “And when you are greeted with a greeting, greet with one better than it, or return it”?

Question:
May Allah reward you with good and benefit us with your knowledge. A sender whose name is symbolized by the letters S-L-M asks: What is the greeting that is better than the greeting with which people greet one another? I mean the saying of Allah, Glorified and Exalted is He:

Answer:
A greeting that is better than it: if he says “As-salamu alaykum” (Peace be upon you), you return it by saying “Wa alaykum as-salam wa rahmatullah” (And upon you be peace and the mercy of Allah), adding “wa rahmatullah” (and the mercy of Allah). If he says “As-salamu alaykum wa rahmatullah” (Peace be upon you and the mercy of Allah), you return it by saying “Wa alaykum as-salam wa rahmatullah wa barakatuh” (And upon you be peace and the mercy of Allah and His blessings), adding “wa barakatuh” (and His blessings). This is the return with something better than it. The return with the same is to use the same wording: if he says “As-salamu alaykum,” you say “Wa alaykum as-salam”; if he says “As-salamu alaykum wa rahmatullah,” you say “Wa alaykum as-salam wa rahmatullah”; and if he says “As-salamu alaykum wa rahmatullah wa barakatuh,” you say “As-salamu alaykum wa rahmatullah wa barakatuh.” This is the return with the same, if you use the wording with which he began. And the better one is to add to it. Yes.