The Prophet (ﷺ) said: "Whoever sends a prayer upon me, Allah sends ten upon him." [1] He (ﷺ) also said: "Do not take my grave as a place of habitual ceremony. Send prayers upon me, for verily your prayers reach me wherever you are." [2] He (ﷺ) also said: "The miser is one whom when I am mentioned to him, fails to send prayers upon me." [3] He (ﷺ) said: 'Allah has Angels who roam the earth and convey salaam to me from my ummah.'[4] He (ﷺ) also said: ''Whenever someone sends salaam upon me, Allah returns my soul to me so that I may return salaam to that person. [5]

Reference: [1] Muslim: 384 [2] Sahih (Albani). Abu Dawud: 2042 [3] Sahih (Albani). Tirmidhi: 3546 [4] Sahih (Albani). Nasai: 1282 [5] Hasan (Albani). Abu Dawud: 2041