Salaam and Greetings of Peace:
Imam Ibn al-Jawzi (ra) in his letter of advice to his son, wrote:
“Know, dear son, that days are but hours, and hours are but breaths, and every soul is a container, hence let not any breath pass without any benefit, such as on the Day of Judgment you find an empty container and feel regret! Be aware of every hour and how it passes, and only spend it in the best possible way; do not neglect yourself, but render it accustomed to the noblest and best of actions, and send to your grave that which will please you when you arrive to it.”
Taken from the always enlightening Lessons of the Day blog of August 14th.