On the authority of the son of Umar (may Allah be pleased with them both), who said:
The Messenger of Allah (may the blessings and peace of Allah be upon him) took me by the shoulder and said:
Be in the world as though you were a stranger or a wayfarer.
The son of Umar used to say:
At evening do not expect (to live till) morning, and at morning do not expect (to live till) evening. Take from your health your illness and from your life for your death.