The Book of the Merits of the Companions
وَحَدَّثَنَاهُ مُحَمَّدُ بْنُ الْمُثَنَّى، وَعُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، قَالاَ حَدَّثَنَا يَحْيَى، - وَهُوَ الْقَطَّانُ - عَنْ عُبَيْدِ اللَّهِ، بِهَذَا الإِسْنَادِ فِي مَعْنَى حَدِيثِ أَبِي أُسَامَةَ وَزَادَ قَالَ فَتَرَكَ الصَّلاَةَ عَلَيْهِمْ .This hadith has been narrated on the authority of 'Ubaidullah with the same chain of transmitter but with the addition of the words:" He abandoned saying prayer over the hypocrites who had died
From Sahih Muslim, whose reports the scholars accept as authentic.