Tafsir of Al-Qiyamah 75:6

He asks: "When will be this Day of Resurrection'' meaning, he says when will the Day of Judgement be His question is only a question of denying its occurrence, and rejecting its existence. This is as Allah says,

ويقولون متى هذا الوعد إن كنتم صدقين قل لكم ميعاد يوم ﻻ تستخرون عنه ساعة وﻻ تستقدمون

And they say: "When is this promise if you are truthful'' Say: "The appointment to you is for a Day, which you cannot put back for an hour nor put forward.'' (34:29-30) Here Allah says,

فٳذا برق البصر