كتاب الصيام
13  
The Book of Fasting
(30)
Chapter: The Virtue of Fasting
(30)
باب فَضْلِ الصِّيَامِ ‏
Sahih Muslim 1151 g

A hadith like this is narrated on the authority of Abu Sinan with the same chain of transmitters (and the words are):

" As he meets Allah, He rewards him, and he is happy."
وَحَدَّثَنِيهِ إِسْحَاقُ بْنُ عُمَرَ بْنِ سَلِيطٍ الْهُذَلِيُّ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، - يَعْنِي ابْنَ مُسْلِمٍ - حَدَّثَنَا ضِرَارُ بْنُ مُرَّةَ، - وَهُوَ أَبُو سِنَانٍ - بِهَذَا الإِسْنَادِ قَالَ وَقَالَ ‏ "‏ إِذَا لَقِيَ اللَّهَ فَجَزَاهُ فَرِحَ ‏"‏ ‏.‏
Reference : Sahih Muslim 1151g
In-book reference : Book 13, Hadith 215
USC-MSA web (English) reference : Book 6, Hadith 2568
  (deprecated numbering scheme)