“Jahannam” is book 57 of Muwatta Malik, the collection of Imam Malik ibn Anas. It holds 2 hadiths — Hadith 1,839–1,840 in the standard numbering. Each is shown below in the original Arabic with an English translation, its full reference, and the grading the hadith scholars gave it where one was recorded.
Malik related to me from Abu'z-Zinad from al-Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "The fire of the children of Adam which they kindle is a seventieth part of the fire of Jahannam." They said, "Messenger of Allah, this fire is certainly enough." He said, "That fire is sixty- nine times greater
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
Mauquf Sahih· Salim al-Hilali
Text from the open hadith-api dataset. Hadith numbering follows that edition and can differ slightly from a printed copy — check the Arabic against a trusted mushaf of hadith before relying on a reference.