Muwatta Malik #1967
Jahannam
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَحَدَّثَنِي مَالِكٌ، عَنْ عَمِّهِ أَبِي سُهَيْلِ بْنِ مَالِكٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّهُ قَالَ أَتُرَوْنَهَا حَمْرَاءَ كَنَارِكُمْ هَذِهِ لَهِيَ أَسْوَدُ مِنَ الْقَارِ " . وَالْقَارُ الزِّفْتُ .
Malik related to me from his paternal uncle Abu Suhayl ibn Malik
from his father that Abu Hurayra said, "Do you think that it is red
like this fire of yours? It is blacker than tar."
About Muwatta Malik
This hadith is #1967 from Muwatta Malik, in the Book of Jahannam.