Al-Baqarah 154

وَلَا تَقُولُوا۟ لِمَن يُقْتَلُ فِى سَبِيلِ ٱللَّهِ أَمْوَٰتٌۢ ۚ بَلْ أَحْيَآءٌ وَلَـٰكِن لَّا تَشْعُرُونَ

walā taqūlū liman yuq'talu fī sabīli l-lahi amwātun bal aḥyāon walākin lā tashʿurūna

And do not say about those who are killed in the way of Allāh, "They are dead." Rather, they are alive, but you perceive [it] not.