The Book of Mosques and Places of Prayer
حَدَّثَنَا يَحْيَى بْنُ أَيُّوبَ، حَدَّثَنَا إِسْمَاعِيلُ، قَالَ وَأَخْبَرَنِيهِ عَبْدُ الرَّحْمَنِ بْنُ حَرْمَلَةَ، عَنْ حَنْظَلَةَ بْنِ عَلِيِّ بْنِ الأَسْقَعِ، عَنْ خُفَافِ بْنِ إِيمَاءٍ، . بِمِثْلِهِ إِلاَّ أَنَّهُ لَمْ يَقُلْ فَجُعِلَتْ لَعْنَةُ الْكَفَرَةِ مِنْ أَجْلِ ذَلِكَ .A hadith like this has been transmitted by Khufaf b. Ima' except this that he did not mention (these words):" cursing of unbelievers got a sanctions
From Sahih Muslim, whose reports the scholars accept as authentic.