Deuteronomy 20:2-6

When you are approaching the battle, the priest shall come forward and speak to the people.

He shall say to them, ‘Hear, Israel, you are approaching the battle against your enemies today. Do not be fainthearted. Do not be afraid, or panic, or be terrified by them,

for the Lord your God is the One who is going with you, to fight for you against your enemies, to save you.’

The officers also shall speak to the people, saying, ‘Who is the man that has built a new house but has not dedicated it? Let him go and return to his house, otherwise he might die in the battle and another man would dedicate it.

And who is the man that has planted a vineyard but has not put it to use? Let him go and return to his house, otherwise he might die in the battle and another man would put it to use.