Hadith 234

وَقَالَ صلى الله عليه وسلم: (مَا مِنْ أَحَدٍ يُسَلِّمُ عَلَيَّ إِلاَّ رَدَّ اللَّهُ عَلَيَّ رُوحِيَ حَتَّى أَرُدَّ عَلَيْهِ السَّلاَمَ)
The Prophet (ﷺ) said: ¤ ¤ "No one sends greetings (or prayers of peace) upon me but Allah returns my soul to me so that I may return his greetings."
Hadith Reference Hisnul Muslim / Chapters / Hadith: 234