They ask you about the Hour, when it will come to pass. Say, `Surely, the knowledge thereof is with my Lord. He alone will reveal it at its proper time. It shall be heavy on the heavens and on the earth. It shall not come upon you but all of a sudden.' They ask you (about it) as if you were curiously solicitous about it (from Allâh). Say, `The knowledge of it is only with Allâh, but most people do not know (this fact).'