The Number of Guardians of Hell and what the Disbelievers said about that

Allah says,

وَمَا جَعَلْنَآ أَصْحَـبَ النَّارِ

وَمَا يَعْلَمُ جُنُوْدَ رَبِّكَ اِلَّا هُو (...And no one knows the hosts of your Lord but He 74:31) Muqatil, among the leading authorities, says that this is rebuttal to Abu Jahl's statement. When he heard this verse which says that there are nineteen angels in charge of Hell, he addressed the youth of Quraish and said that Muhammad has only nineteen companions, so there is nothing to worry about. Baihaqi records a narrative from Suddi that when verse 30 was revealed, a foolish Quraishi unbeliever, Abul-Asalain by name, spoke out: '0 nation of Quraish, I alone am sufficient for the nineteen. I will take care of ten with my right arm, and nine with my left arm. Thus I will put an end to all nineteen of them.' On this occasion, this verse was revealed. '0 fools, first of all one angel is sufficient for all. Moreover, the number nineteen refers to the chiefs of angels. Under each of these angels, the number of Allah's angels is legion beyond human count or computation. Allah alone knows their number. They are ready at hand to carry out the punishment to the unbelievers and transgressors.'

In the next verses, there is the mention of the Hereafter and its horrors.