Sunan Abu Dawud · Hadith 4317
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، عَنْ مُحَمَّدِ بْنِ جَعْفَرٍ، عَنْ شُعْبَةَ، ك ف ر .
Shu’bah said in his version:“the letters k, f, r” (are on his forehead)
Sahih · Al-AlbaniSahih · Shuaib Al ArnautSahih Muslim (2933) · Zubair Ali Zai