The Book of Forgetfulness (In Prayer)
13/55. Chapter:
The virtue of sending salah upon the Prophet (SAW)
Sunan an-Nasai
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ جَعْفَرٍ، عَنِ الْعَلاَءِ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ صَلَّى عَلَىَّ وَاحِدَةً صَلَّى اللَّهُ عَلَيْهِ عَشْرًا " .
It was narrated from Abu Hurairah that: The Prophet (ﷺ) said: "Whoever sends salah upon me once, Allah (SWT) will send salah upon him tenfold."
Reference : Sunan an-Nasa'i 1296In-book reference : Book 13, Hadith 118English translation : Vol. 2, Book 13, Hadith 1297