Allah's Messenger (ﷺ) 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."
Reference: Sahih al-Bukhari 1039 In-book : Book 15, Hadith 34 USC-MSA web (English) : Vol. 2, Book 17, Hadith 149 (deprecated)
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