A hadith like this has been transmitted on the authority of A'mash with the same chain of transmitters and he (further) said:

There is for him ten like that (the good he performed) or more than that.

حَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، بِهَذَا الإِسْنَادِ ‏.‏ نَحْوَهُ غَيْرَ أَنَّهُ قَالَ ‏

‏ فَلَهُ عَشْرُ أَمْثَالِهَا أَوْ أَزِيدُ ‏

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