This hadith has been narrated by Shu'ba with the same chain of transmitters (but with a slight variation of words, that he said):

(O Allah), bless them."

وَحَدَّثَنَاهُ ابْنُ نُمَيْرٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ إِدْرِيسَ، عَنْ شُعْبَةَ، بِهَذَا الإِسْنَادِ غَيْرَ أَنَّهُ قَالَ ‏

‏ صَلِّ عَلَيْهِمْ ‏

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