Translation of the verse 156 from Surah al-‘Imran : Number of verses 200 - - page 70 - Part 4.
O you who believe! Be not like those who disbelieve (hypocrites) and who say to their brethren when they travel through the earth or go out to fight: "If they had stayed with us, they would not have died or been killed," so that Allah may make it a cause of regret in their hearts. It is Allah that gives life and causes death. And Allah is All-Seer of what you do.
O you who have believed, do not be like those who disbelieved and said about their brothers when they traveled through the land or went out to fight, "If they had been with us, they would not have died or have been killed," so Allah makes that [misconception] a regret within their hearts. And it is Allah who gives life and causes death, and Allah is Seeing of what you do.
(3:156) Believers, do not behave like those who disbelieved and say to their brothers (who meet some mishap) in the course of their journey for fighting: 'Had they remained with us, they would not have died nor been slain.' Allah makes such thoughts the cause of deep regrets in their hearts. *113 For in truth it is Allah alone who grants life and deals death. Allah sees all that you do.
*113). Such ideas had no solid ground. God's decree regarding the time of one's death cannot be deferred. Those who lack faith in God and think that everything is dependent on their own scheming and effort rather than on the overpowering Will of God become victims of perpetual remorse, since they never cease to reflect how a slightly different circumstance or slightly altered strategy could have led to an altogether different and wholesome result.