Cross reference
Judges 4:13
13 Sisera gathered together all his chariots, even nine hundred chariots of iron, and all the people who were with him, from Harosheth of the Gentiles, to the river Kishon.
Judges 4:2-3
2 Yahweh sold them into the hand of Jabin king of Canaan, who reigned in Hazor; the captain of whose host was Sisera, who lived in Harosheth of the Gentiles.
3 The children of Israel cried to Yahweh: for he had nine hundred chariots of iron; and twenty years he mightily oppressed the children of Israel.
Judges 4:7
7 I will draw to you, to the river Kishon, Sisera, the captain of Jabin's army, with his chariots and his multitude; and I will deliver him into your hand.