Deuteronomy 20:6-8

20:6 Or who among you has planted a vineyard and not benefited from it? He may go home, lest he die in battle and someone else benefit from it. 20:7 Or who among you has become engaged to a woman but has not married her? He may go home, lest he die in battle and someone else marry her.” 20:8 In addition, the officers are to say to the troops, “Who among you is afraid and fainthearted? He may go home so that he will not make his fellow soldier’s heart as fearful as his own.”