Sahih Muslim , Book 4, Hadith 806 (USC-MSA) ⓘ
A hadith like this has been narrated by al-Hakam except that he said: " Bless Muhammad" and he did not say:" O Allah I
حَدَّثَنَا مُحَمَّدُ بْنُ بَكَّارٍ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ زَكَرِيَّاءَ، عَنِ الأَعْمَشِ، وَعَنْ مِسْعَرٍ، وَعَنْ مَالِكِ بْنِ مِغْوَلٍ، كُلُّهُمْ عَنِ الْحَكَمِ، بِهَذَا الإِسْنَادِ مِثْلَهُ غَيْرَ أَنَّهُ قَالَ " وَبَارِكْ عَلَى مُحَمَّدٍ " . وَلَمْ يَقُلِ اللَّهُمَّ .
also referenced under: Book 4, Hadith 72 (In-Book) & Hadith 406 (Reference)