Jami' at-Tirmidhi #2687

اغْتَنِمْ خَمْسًا قَبْلَ خَمْسٍ شَبَابَكَ قَبْلَ هَرَمِكَ وَصِحَّتَكَ قَبْلَ سَقَمِكَ وَغِنَاكَ قَبْلَ فَقْرِكَ وَفَرَاغَكَ قَبْلَ شُغْلِكَ وَحَيَاتَكَ قَبْلَ مَوْتِكَ

The Messenger of Allah (ﷺ) said: 'Make use of five before five: your youth before your old age, your health before your sickness, your wealth before your poverty, your free time before you become busy, and your life before your death.'