American Standard Version (ASV):
And it shall be, when ye have seized upon the city, that ye shall set the city on fire; according to the word of Jehovah shall ye do: see, I have commanded you.
King James Version (KJV):
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.