Sahih al-Bukhari Book 65, Hadith 220
While we were with Allah's Messenger (ﷺ) he said, "Tell me of a tree which resembles a Muslim man. Its
leaves do not fall and it does not, and does not, and does not, and it gives its fruits every now and
then." It came to my mind that such a tree must be the date palm, but seeing Abu Bakr and `Umar
saying nothing, I disliked to speak. So when they did not say anything, Allah's Messenger (ﷺ) said, "It is the
date-palm tree." When we got up (from that place), I said to `Umar, "O my father! By Allah, it came
to my mind that it must be the date palm tree." `Umar said, "What prevented you from speaking" I
replied, "I did not see you speaking, so I misliked to speak or say anything." `Umar then said, "If you
had said it, it would have been dearer to me than so-and-so."
Allah's Messenger (ﷺ) said, "The keys of Unseen are five which none knows but Allah: None knows what will happen tomorrow but Allah; none knows what is in the wombs (a male child or a female) but Allah; none knows when it will rain but Allah; none knows at what place one will die; none knows when the Hour will be established but Allah." (See The Qur'an 31:34.")
Allah's Messenger (ﷺ) said, "When a Muslim is questioned in his grave, he will testify that none has the right to be worshipped but Allah and that Muhammad is Allah's Messenger (ﷺ), and that is what is meant by Allah's Statement:-- "Allah will keep firm those who believe with a Word that stands firm in this world and in the Hereafter." (14.27)