Qur'ān 3:157 · Aal-i-Imran (آل عمران)

وَلَئِن قُتِلْتُمْ فِى سَبِيلِ ٱللَّهِ أَوْ مُتُّمْ لَمَغْفِرَةٌۭ مِّنَ ٱللَّهِ وَرَحْمَةٌ خَيْرٌۭ مِّمَّا يَجْمَعُونَ

And if you are killed in the cause of Allah or die - then forgiveness from Allah and mercy are better than whatever they accumulate [in this world].