[16].Surah An-Nahl [The Bees] : Ayat 119

Ayat 119. Then, verily! Your Lord for those who do evil (commit sins and are disobedient to Allah) in ignorance and afterward repent and do righteous deeds, verily, your Lord thereafter, (to such) is Oft-Forgiving, Most Merciful. 

Hazrat Ibn Abbas (May Allah be pleased with him) reported: Messenger of Allah [SAWW](PBUH) said, "There are two blessings in which many people incur loss. (They are) health and free time (for doing good)".

[Al-Bukhari Volume 08, Chapter 76, Hadith # 421]. 

Lesson : as mentioned above in Surah An-Nahl Ayat 119. "who do evil (commit sins and are disobedient to Allah) in ignorance and afterward repent and do righteous deeds", 1. Al-Ghabn in Arabic means loss. What it really signifies is to sell something of one's own on less than its due price, or to buy something on its double or triple price. In both cases one is a loser. When a person comes to know about such a loss, he repents and feels sorry for it. This loss coupled with regret is called Al-Ghabn. In Ahadith, man has been compared with trader, and health and leisure enjoyed by him with merchandise. One who uses his merchandise with care, gains profit while he who wastes it, that is to say, uses it carelessly, will be a loser on the Day of Resurrection.

2. The majority of people do not take proper care of both these things, with the result that one wastes the time in useless activities and spends the physical strength and energy in the disobedience of Allah. One will have to face severe consequences of it on the Day of Resurrection when he will be brought into account for everything.