Aali-Imran 3:156 يا ايها الذين امنوا لا تكونوا كالذين كفروا وقالوا لاخوانهم اذا ضربوا في الارض او كانوا غزى لو كانوا عندنا ما ماتوا وما قتلوا ليجعل الله ذالك حسرة في قلوبهم والله يحيي ويميت والله بما تعملون بصير ١٥٦

O believers! Do not be like the unfaithful¹ who say about their brothers who travel throughout the land or engage in battle, “If they had stayed with us, they would not have died or been killed.” Allah makes such thinking a cause of agony in their hearts. It is Allah who gives life and causes death. And Allah is All-Seeing 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 Allāh makes that [misconception] a regret within their hearts. And it is Allāh who gives life and causes death, and Allāh is Seeing of what you do.