The keys of the unseen are five

Bukhari:Vol 9, Book93, Num476: Narrated Ibn Umar:

The Prophet said, "The keys of the unseen are five and none knows them but Allah:

(1) None knows what is in the womb, but Allah:

(2) None knows what will happen tomorrow, but Allah;

(3) None knows when it will rain, but Allah;

(4) None knows where he will die, but Allah (knows that);

(5) and none knows when the Hour will be established, but Allah."