Deuteronomy 24:5

"When a man has taken a new wife, he shall not go out to war or be charged with any business; he shall be free at home one year, and bring happiness to his wife whom he has taken.

Surrounding context

24:4 then her former husband who divorced her must not take her back to be his wife after she has been defiled; for that is an abomination before the LORD, and you shall not bring sin on the land which the LORD your God is giving you as an inheritance.

24:5 "When a man has taken a new wife, he shall not go out to war or be charged with any business; he shall be free at home one year, and bring happiness to his wife whom he has taken.

24:6 "No man shall take the lower or the upper millstone in pledge, for he takes one's living in pledge.

Translation and sources