Joshua 8:8

8:8 It shall be, when you have seized on the city, that you shall set the city on fire; according to the word of Yahweh shall you do: behold, I have commanded you.
-World English Bible

Other Translation

8:8 And it shall be, when ye have taken the city, [that] ye shall set the city on fire: according to the commandment of the LORD shall ye do. See, I have commanded you.
-King James Version