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 " .
Muslim
The Book of Fasting • Hadith 215