Verses with the word fuel in the Old Testament (5 verses):

Isaiah 9:5
For every battle of the warrior is with confused noise, and garments rolled in blood; but this shall be with burning and fuel of fire.

Isaiah 9:19
Through the wrath of the LORD of hosts is the land darkened, and the people shall be as the fuel of the fire: no man shall spare his brother.

Ezekiel 15:4
Behold, it is cast into the fire for fuel; the fire devoureth both the ends of it, and the midst of it is burned. Is it meet for any work?

Ezekiel 15:6
Therefore thus saith the Lord GOD; As the vine tree among the trees of the forest, which I have given to the fire for fuel, so will I give the inhabitants of Jerusalem.

Ezekiel 21:32
Thou shalt be for fuel to the fire; thy blood shall be in the midst of the land; thou shalt be no more remembered: for I the LORD have spoken it.