Be in this world as though you were a stranger or a traveler/wayfarer.

Narrated by Ibn ‘Umar, radiyallahu ‘anhuma, who said: The Messenger of Allah صلی اللہ علیہ وسلم said:

Be in this world as though you were a stranger or a traveler/wayfarer.
When evening comes, do not expect (to live till) morning, and when morning comes, do not expect (to live till) evening. Take from your health (a preparation) for your illness, and from your life for your death.[Al-Bukhari]