The Messenger of Allah ﷺ came one day with a joyful expression on his face. He said: "Jibril came to me and said: 'Will it not please you, O Muhammad, (to know) that no one of your Ummah will send salah upon you but I will send salah upon him tenfold, and no one will send salams upon you but I will send salams upon him tenfold?" (Using translation from Nasāʾī 1295)  

أَنَّ رَسُولَ اللهِ ﷺ جَاءَ ذَاتَ يَوْمٍ وَالْبِشْرُ يُرَى فِي وَجْهِهِ فَقَالَ إِنَّهُ جَاءَنِي جِبْرِيلُ فَقَالَ إِنَّ رَبِّكَ يَقُولُ أَمَا يُرْضِيكَ يَا مُحَمَّدُ أَنَّهُ لَا يُصَلِّي عَلَيْكَ أَحَدٌ مِنْ أُمَّتِكَ إِلَّا صَلَّيْتُ عَلَيْهِ عَشْرًا وَلَا يُسَلِّمُ عَلَيْكَ أَحَدٌ مِنْ أُمَّتِكَ إِلَّا سَلَّمْتُ عَلَيْهِ عَشْرًا  

The Prophet ﷺ said: If anyone invokes blessings on me once, Allah will bless him ten times. (Using translation from Abū Dāʾūd 1530)  

عَنِ النَّبِيِّ ﷺ قَالَ «مَنْ صَلَّى عَلَيَّ وَاحِدَةً صَلَّى الله عَلَيْهِ عَشْرًا»  

"The Messenger of Allah ﷺ said: "Whoever sends salah upon me once, Allah (SWT) will send salah upon him tenfold, and will erase ten sins from him, and will raise him ten degrees in status." (Using translation from Nasāʾī 1297)  

قَالَ رَسُولُ اللهِ ﷺ «مَنْ صَلَّى عَلَيَّ صَلَاةً وَاحِدَةً صَلَّى الله عَلَيْهِ عَشْرَ صَلَوَاتٍ وَحُطَّتْ عَنْهُ عَشْرُ خَطِيئَاتٍ وَرُفِعَتْ لَهُ عَشْرُ دَرَجَاتٍ»