...With him are the keys of the Unseen

Bismillahir Rahmanir Rahim
In the name of Allah, the Most Beneficent, the Most Merciful

Allah says: 

“With him are the keys of the Unseen. No one knows them save He. And He knows what is in the land and the sea. Not a leaf falls but He knows it, not a grain amid the darkness of the earth, naught of wet or dry but (it is noted) in a clear record.” 

[Sûrah al-An`âm: 59]

Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah (PBUH) said,

 "Hasten to do good deeds before you are overtaken by one of the seven afflictions.'' Then (giving a warning) he said, "Are you waiting for such poverty which will make you unmindful of devotion; or prosperity which will make you corrupt, or disease as will disable you, or such senility as will make you mentally unstable, or sudden death, or Ad-Dajjal who is the worst expected absent, or the Hour, and the Hour will be most grievous and most bitter".  

[At-Tirmidhi]