Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "Whenever someone greets me, Allah returns the soul to my body (in the grave) and I return his greeting."[Abu Dawud]. (PT)
App reference (PT): Book 15, Hadith 6 (PT)
Arabic/English book reference (PT): Book 15, Hadith 1402 (PT)