The word is used repeatedly in Scripture, both as a real representation of the thing itself, and also figuratively. Very terrible were the war chariots, with which men fought in battle. Jabin, king of Canaan, it is said, had nine hundred chariots of iron, and mightily oppressed the children of Israel. (Judges 4:3) But when the term of chariot is applied to express spiritual things, the matter becomes more interesting. Thus Elijah's chariot, by which he went up into heaven; is called, the chariots of Israel, and the horsemen thereof; by which is meant, the ascension of Elijah's fervent prayers for Israel, were more powerful and prevailing than all the chariots of Israel in their defence. And doubtless, as the prophet in this instance became a type of Christ, in his priestly and regal office, the whole is abundantly plain and evident. (2 Kings 2:12) So again, in the book of the Songs, (Song of Solomon 3:9) Solomon is said to have made a chariot of the wood of Lebanon; the pillars silver, the bottom of gold, the covering purple, and the midst thereof paved with love, for the daughters of Jerusalem."There can be no doubt, but that this is designed to speak of the Lord Jesus Christ, whose chariot of love, founded in himself, both in his GODHEAD and manhood, whose acts of grace, are richer than gold and silver, and whose whole heart is full of love to his beloved Jerusalem. Hence, the church in return, feeling all her affections awakened by grace, to the love of Jesus, cries out in an holy rapture of joy and delight," Or ever I was aware, my soul made me like the chariots of Ammi-nadib?' (Song of Solomon 6:12)
See Amminadib