(4) باب فِي الأَمَلِ وَطُولِهِ
Narrated Anas bin Malik:
The Prophet (ﷺ) drew a few lines and said, "This is (man's) hope, and this is the instant of his death, and while he is in this state (of hope), the nearer line (death) comes to Him."
Reference: Sahih al-Bukhari 6418
In-book reference: Book 81, Hadith 7
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 76, Hadith 427