Al-Ahzab · 33:18

18. Allah knows those of you who hold others back from fighting alongside Allah’s Messenger (peace be upon him) and those who say to their brothers: “Come to us and do not fight alongside him, lest you get killed, because we fear you will get killed”. And these forsaken people do not come to battle or participate in it except rarely, to remove blame from themselves, not to help Allah and His Messenger.