‘Ali Ibn Abi Talib (radiallaahu anhu) said:
“This world is soon coming to an end and will bid farewell, and the hereafter is coming and will soon begin. Today the horses are being kept in preparation, and tomorrow will be the race.
Indeed you are living in the days of hope that will be interrupted by death. Whoever falls short during the days of hope before his death comes will be doomed.
Strive hard for the sake of Allah (Subhanahu wa Ta’ala) in the hope of reward as you strive hard for His sake for fear of His punishment.
I have never seen anything like paradise whose seekers could sleep. And I have never seen anything like hell, those who fear which can sleep.
The one who does not benefit from the truth will be harmed by falsehood, and whoever does not benefit from guidance will be led astray by misguidance.
You have been instructed to travel, and you have been told about your provision. O people, this world is a temporary convenience; the righteous and the immoral alike may enjoy its luxuries. But the hereafter is true, and it will be ruled by a powerful King.
Satan threatens you with poverty and bids you to do evil, but Allah (Subhanahu wa Ta’ala) promises you forgiveness and bounty from Him, and Allah (Subhanahu wa Ta’ala) cares for all and knows all things.
O people, do righteous deeds during your lifetime, and your offspring will be taken care of.
Allah (Subhanahu wa Ta’ala) has promised His paradise to those who obey Him, and He has warned of His hell for those who disobey Him. Its fire will never be extinguished, its prisoners will never be ransomed, and the one who suffers therein will never be helped. Its heat is intense, its bottom is deep and its water is a boiling fetid liquid.”
[Al-Bidaayah Wan-Nihaayah, 8/7]