يَسْـَٔلُونَكَ عَنِ ٱلسَّاعَةِ أَيَّانَ مُرْسَىٰهَا ۖ قُلْ إِنَّمَا عِلْمُهَا عِندَ رَبِّى ۖ لَا يُجَلِّيهَا لِوَقْتِهَآ إِلَّا هُوَ ۚ ثَقُلَتْ فِى ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ ۚ لَا تَأْتِيكُمْ إِلَّا بَغْتَةً ۗ يَسْـَٔلُونَكَ كَأَنَّكَ حَفِىٌّ عَنْهَا ۖ قُلْ إِنَّمَا عِلْمُهَا عِندَ ٱللَّهِ وَلَـٰكِنَّ أَكْثَرَ ٱلنَّاسِ لَا يَعْلَمُونَ
Asad Quran Translation
THEY WILL ASK thee [O Prophet] about the Last Hour: "When will it come to pass?" Say: "Verily, knowledge thereof rests with my Sustainer alone. None but He will reveal it in its time. Heavily will it weigh on the heavens and the earth; [and] it will not fall upon you otherwise than of a sudden." They will ask thee - as if thou couldst gain insight into this [mystery] by dint of persistent inquiry!153
Say: "Knowledge thereof rests with my Sustainer alone; but [of this] most people are unaware."
The verb ahfa means "he did [a thing] in an excessive measure" or "he exceeded the usual bounds in doing [something]". In connection with an inquiry, and especially when followed by 'anhu or 'anha ("about it"), it signifies "he tried hard to gain insight [into something] by persistently inquiring about it". Thus, used as a participle, it means "one who has gained insight [into something] through persistent inquiry". In the above context, the implication is that no amount of inquiry or speculation can reveal to man - the prophets included - the coming of the Last Hour before its actual manifestation.
Malik Quran Translation
They ask you about the Hour of Doom and when will it take place. Say: "Knowledge about it rests only with my Rabb: He Himself will disclose it at the proper time. Heavy is its weight in the heavens and the earth. It will not come gradually but all of a sudden. They ask you as if you yourself were in search of it. Tell them: "The knowledge about it rests only with Allah though most people do not understand."
Yusuf Ali Quran Translation
They ask thee about the (final) hour when will be its appointed time? Say: "The knowledge thereof is with my Lord (alone): none but He can reveal as to when it will occur. Heavy were its burden through the heavens and the earth. Only all of a sudden will it come to you. They ask thee as if thou wert eager in search thereof: Say: "The knowledge thereof is with Allah (alone) but most men know not." 1159 1160
The fact of its coming is a certainty: the exact time appointed for it is not revealed by Allah. If it were it would be so momentous as to disturb our thoughts and life. It would be a heavy burden to us. Our duty is to be prepared for it at all times. It will come when we least expect it. In the present Gospels Jesus says the same thing: he does not know the Hour, but it will come suddenly. "But of that day and that Hour knoweth no man, no, not the angels which are in heaven, neither the Son, but the Father. Take ye heed, watch and pray: for ye know not when the time is." (Mark. xiii. 32-33).
Hafi is usually construed to mean; "eager or anxious in search of": the preposition following here is 'an = concerning, about. Some commentators (including Ragib) understand it in this passage to mean "well-acquainted." In xix. 47, with the preposition by following it, it signifies "well-disposed to", favourable to, good to, kind to."
Mustafa Khattab Quran Translation
They ask you ˹O Prophet˺ regarding the Hour, “When will it be?” Say, “That knowledge is only with my Lord. He alone will reveal it when the time comes. It is too tremendous for the heavens and the earth and will only take you by surprise.” They ask you as if you had full knowledge of it. Say, “That knowledge is only with Allah, but most people do not know.”
Piktal Quran Translation
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.
Yasaloonaka AAani alssaAAati ayyana mursaha qul innama AAilmuha AAinda rabbee la yujalleeha liwaqtiha illa huwa thaqulat fee alssamawati waalardi la tateekum illa baghtatan yasaloonaka kaannaka hafiyyun AAanha qul innama AAilmuha AAinda Allahi walakinna akthara alnnasi la yaAAlamoona