Riyad as-Salihin 858 — The Book of Greetings

Abu Umamah Sudaiy bin 'Ajlan Al-Bahili Narrated from:

The Messenger of Allah (ﷺ) said, "The person nearest to Allah is one who is the first to offer greeting." [Abu Dawud, with a sound chain]. The narration in At-Tirmidhi is: The Messenger of Allah (ﷺ) was asked: "O Messenger of Allah! When two persons meet, who should greet the other first?'' The Messenger of Allah (ﷺ) said, "The person nearest to Allah (i.e., one who is more obedient and therefore closer to Allah will say: As-Salam first)."