Al-A'raaf 7:187

They ask you [O Prophet] about the Hour, “When will it come to pass?” Say, “Its knowledge is only with my Lord. None can reveal its due time except Him. It will be heavy on the heavens and earth; it will only come to you by surprise.” They ask you as if you are well-aware of it. Say, “Its knowledge is only with Allah, but most people do not know.”

They ask you, [O Muḥammad], about the Hour: when is its arrival?[428] Say, "Its knowledge is only with my Lord. None will reveal its time except Him. It lays heavily[429] upon the heavens and the earth. It will not come upon you except unexpectedly." They ask you as if you are familiar with it. Say, "Its knowledge is only with Allāh, but most of the people do not know."

[428] Literally, "resting" or "establishment."
[429] i.e., it is a source of concern, worry or fear.

187. They ask you about the Hour (Day of Resurrection): "When will be its appointed time?" Say: "The knowledge thereof is with my Lord (Alone). None can reveal its time but He. Heavy is its burden through the heavens and the earth. It shall not come upon you except all of a sudden." They ask you as if you have a good knowledge of it. Say: "The knowledge thereof is with Allâh (Alone), but most of mankind know not."[15]

[15] (V.7:187): Narrated ‘Abdullâh رضي الله عنه: Allâh’s Messenger صلى الله عليه وسلم said, "The keys of the unseen are five: Verily Allâh! With Him (Alone) is the knowledge of the Hour, He sends down the rain, and knows that which is in the wombs. No person knows what he will earn tomorrow, and no person knows in what land he will die. Verily, Allâh is All-Knower, All-Aware." (V.31:34). (Sahih Al-Bukhâri, Vol. 6, hadîth No. 151).

They ask thee of the (destined) Hour, when will it come to port. Say: Knowledge thereof is with my Lord only. He alone will manifest it at its proper time. It is heavy in the heavens and the earth. It cometh not to you save unawares. They question thee as if thou couldst be well informed thereof. Say: Knowledge thereof is with Allah only, but most of mankind know not.