Behold! We told thee that thy Lord doth encompass mankind round about: We granted the vision which We showed thee, but as a trial for men,- as also the Cursed Tree (mentioned) in the Qur'an: We put terror (and warning) into them, but it only increases their inordinate transgression! (17:60)

Is that the better entertainment or the Tree of Zaqqum? (37:62)

For We have truly made it (as) a trial for the wrong-doers. (37:63)

"Ye will surely taste of the Tree of Zaqqum. (56:52)