Ibaadah - Worship & Obedience of Allah ﷻ
This life is our only chance.
It is a sin to pray for your own death and a prophetic hadith teaches us the great wisdom behind not wishing for one’s death: “Let none among you wish for death or supplicate for it to occur before it actually arrives; when one dies, his deeds come to an end. And age does not add to a believer except in goodness.” The only reason why we have come to this world is to earn good for the hereafter and this life is our only chance. If you wish for this to end then you are actually wishing for the best thing for yourself to end. The hereafter is the final destination but what leads towards that destination is placed here on earth for us. The world is the sowing ground and the reaping of what we sow shall take place in the hereafter. Our life on earth is the only sowing ground available therefore one should take advantage of whatever is left of it.
This life is like that advice of Prophet Muhammad ﷺ about finishing one’s food on plate, leaving nothing, not even a small bit for he said you never know which part has blessings in it. Consider this life a plate that has your meal, which would keep you alert and healthy throughout the rest of the day if you consumed whatever was in it. Similarly, this life and all the opportunity to earn good, lies in it. You never know which moment of this life might help you earn something so great or give you the opportunity to earn such forgiveness and mercy of Allah ﷻ that will make you successful in the hereafter.
In a hadith there is a fact mentioned that some people of paradise would not experience any grieve except for one, and that is the moments of their life wasted when they did not engage in zikr (remembrance). Zikr is expressing gratefulness, thankfulness and glorifying Allah ﷻ with the tongue and in one’s hearts, which brings peace to the heart, mind and soul. Once in paradise they will realize how much they could have achieved had they been careful and invested in those wasted moments of time. The Prophet ﷺ said: “The people of paradise will not grieve for anything else except those moments in which they were not engaged in the zikr (remembrance) of Allah ﷻ.”Such would be the case of the people of paradise who have everything and anything they desire, will always remain young, in peace and will do whatever they wish to, have whatever they wish for and Allah ﷻ will remain pleased with them forever, yet some of them will carry regret of wasting moments of their earthly life. If this is the case of some people of paradise imagine the grieve of such persons who wasted their entire lives doing not much good in addition to praying for their own death, especially when this life is the only opportunity available for them to be blessed in the hereafter.
 Musnad Ahmad
 Narrated by Bayhaqi in Shuab al-iman (1:392 #512-513) and by Tabarani. Haythami in Majma al-zawaid (10:74) said that its narrators are all trustworthy (thiqat), while Suyuti declared it hasan in his Jami al-saghir (#7701) – Sunnah.org