Deuteronomy 20:5

20:5 Moreover, the officers are to say to the troops, “Who among you has built a new house and not dedicated it? He may go home, lest he die in battle and someone else dedicate it.

Deuteronomy 20:8

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.”