Deuteronomy 20:5-8

5The officers shall say to the army: “Has anyone built a new house and not yet begun to live in it? Let him go home, or he may die in battle and someone else may begin to live in it.

6Has anyone planted a vineyard and not begun to enjoy it? Let him go home, or he may die in battle and someone else enjoy it.

7Has anyone become pledged to a woman and not married her? Let him go home, or he may die in battle and someone else marry her.”

8Then the officers shall add, “Is anyone afraid or fainthearted? Let him go home so that his fellow soldiers will not become disheartened too.”