Mukhtasar Bukhari (Abridged) 560 — Only Allah knows when it will rain

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) said: "The keys of the unseen are five, which no one knows except Allah: (1) No one knows what will happen tomorrow; (2) No one knows what is in the womb; (3) No one knows what he will do tomorrow; (4) No one knows in which land he will die; (5) No one knows when it will rain."