Excellence of sending prayers upon the Prophet (saws)

قَالَ النَّبِيُّ صلى الله عليه وسلم: (مَنْ صَلَّى عَلَيَّ صَلاَةً صَلَّى اللَّهُ عَلَيْهِ بِهَا عَشْراً)

-- The Prophet (ﷺ) said: "Whoever prays for Allah's blessings upon me once, will be blessed for it by Allah ten times." Reference: Muslim 1/288.

Reference : Hisn al-Muslim 219

وَقَالَ صلى الله عليه وسلم: (لاَ تَجْعَلُوا قَبْرِي عِيداً وَصَلُّوا عَلَيَّ؛ فَإِنَّ صَلاَتَكُم تَبْلُغُنِي حَيْثُ كُنْتُمْ)

-- The Prophet (ﷺ) said: "Do not make my grave a place of ritual celebration, but pray for Allah's blessings upon me, for your blessings reach me from wherever you are. Reference: Abu Dawud 2/218, Ahmad 2/367. Al-Albani graded it authentic in Sahih Abu Dawud 2/383.

Reference : Hisn al-Muslim 220

وَقَالَ صلى الله عليه وسلم: (الْبَخِيلُ مَنْ ذُكِرْتُ عِنْدَهُ فَلَمْ يُصَلِّ عَلَيَّ)

-- The Prophet (ﷺ) said: "The miser is the one in whose presence I am mentioned yet does not pray for Allah's blessings upon me." Reference: At-Tirmidhi 5/551 and others. See also Al-Albani, Sahih At-Tirmidhi 3/177 and Sahihul-Jarai' As-Saghir 3/25.

Reference : Hisn al-Muslim 221

وَقَالَ صلى الله عليه وسلم:(إِنَّ لِلَّهِ مَلاَئِكَةً سَيَّاحِينَ فِي الْأَرْضِ يُبَلِّغُونِي مِنْ أُمَّتِي السَّلاَمَ)

-- The Prophet (ﷺ) said: "Indeed Allah has angels who roam the earth and they convey to me the greetings (or prayers of peace) of my Ummah (nation)." Reference: An-Nasa'i, Al-Hakim 2/421. Al-Albani graded it authentic in Sahih An-Nasa'i 1/274.

Reference : Hisn al-Muslim 222

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." Reference: Abu Dawud (no. 2041). Al-Albani graded it good in Sahih Abu Dawud 1/383.

Reference : Hisn al-Muslim 223