An-Nawawy’s Forty Hadiths: (40) Muslim’s Attitude towards Worldly Life
On the authority of Abdullah ibn Umar (may Allah be pleased with him) who said, "The Messenger of Allah (peace and blessings of Allah be upon him) took me by the shoulder and said, 'Be in this world as though you were a stranger or a wayfarer.' And Ibn Umar (may Allah be pleased with him) used to say, “In the evening do not expect [to live until] the morning, and in the morning do not expect [to live until] the evening. Take [advantage of] your health before times of sickness, and [take advantage of] your life before your death." (Bukhari)