بسم الله الرحمن الرحيم
Bismillā hir Rahmā nir Rahīm
In the name of Allah, Most Gracious, Most Merciful
As-Salāmu `Alaykum (السلام عليكم):
There are five keys to the knowledge of the unseen that only Allah knows:
Sahih Bukhari Volume 2, Book 17, Number 149:
Narrated Ibn 'Umar:
Allah's Apostle (p.b.u.h) said, "Keys of the unseen knowledge are five which nobody knows but Allah . . . nobody knows what will happen tomorrow; nobody knows what is in the womb; nobody knows what he will gain tomorrow; nobody knows at what place he will die; and nobody knows when it will rain."