Allâh's Messenger (ﷺ) said, "There are two blessings which many people lose: (They are) health and free time for doing good." [1] [8:421-O.B]

Ibn Umar said, "Allâh's Messenger (ﷺ), took hold of my shoulder and said, 'Be in this world as if you were a stranger or a traveller. ', "(The subnarrator added): Ibn 'Umar used to say, "If you survive till the evening, do not expect to be alive in the morning, and if you survive till the morning, do not expect to be alive in the evening, and take from your health for your sickness, and (take) from your life for your death." [1] [8:425-O.B]

The Prophet (ﷺ) drew a square and then drew a line in the middle of it and let it extend outside the square and then drew several small lines attached to that central line, and said, "This is the human being, and this (the square) is his lease of life (his or her day of death) encircles him from all sides (or has encircled him), and this (line) which is outside (the square) is his hope, and these small lines are the calamities and troubles (which may befall him), and if one misses him, another will snap (i.e., overtake) him, and if the other misses him, a third will snap (i.e., overtake) him." [8:426-0.B]

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." [8:427-O.B]

The Prophet (ﷺ) said, "Allâh will not accept the excuse of any person whose instant of death is delayed till he is sixty years of age. [1] [8:428-O.B]

I heard Allâh's Messenger (ﷺ) saying, "The heart of an old man remains young in two respects, i.e., his love for the world (its wealth, amusements and luxuries) and his incessant hope." [8:429-0.B]