Another angel-like creature mentioned in the Qu’ran (4:97, 32:11) is the "zabāniya." A "zabāniya" is a black angel of hell that brings souls of sinners down to hell to punish them and can be seen in illustrations of "The Timurid Book of the Prophet Muhammad’s Ascension" (c. 1436 A.D.). There are nineteen "zabāniya," led by "Mālik", an angel considered to be the master of fire or the gatekeeper of hell"." "Mālik's" and "zabāniya's" categorizations as angels are debated as some believe they are better described as spirits or demons. Actually, portrayal of "Zabaniyya" shares many traits characteristical for demons in Islamic arts. As seen in "The Timurid Book of the Prophet Muhammad’s Ascension," Muhammad is greeted by "Mālik" and later witnesses the torture of sinners carried out by the "zabāniya."