Deuteronomy 20:7

4 for Jehovah your God is he that goeth with you, to fight for you against your enemies, to save you.

5 And the officers shall speak unto the people, saying, What man is there that hath built a new house, and hath not dedicated it? let him go and return to his house, lest he die in the battle, and another man dedicate it.

6 And what man is there that hath planted a vineyard, and hath not used the fruit thereof? let him go and return unto his house, lest he die in the battle, and another man use the fruit thereof.

7 And what man is there that hath betrothed a wife, and hath not taken her? let him go and return unto his house, lest he die in the battle, and another man take her.

8 And the officers shall speak further unto the people, and they shall say, What man is there that is fearful and faint-hearted? let him go and return unto his house, lest his brethren`s heart melt as his heart.

9 And it shall be, when the officers have made an end of speaking unto the people, that they shall appoint captains of hosts at the head of the people.

10 When thou drawest nigh unto a city to fight against it, then proclaim peace unto it.