1 Chronicles 19:7

Overview - 1 Chronicles 19
David's messengers, sent to comfort Hanun, the son of Nahash, are villainously treated.
The Ammonites, strengthened by the Syrians, are overcome by Joab and Abishai.
16 Shophach, making a new supply of the Syrians, is slain by David.
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1 Chronicles 19:7  (King James Version)
So they hired thirty and two thousand chariots, and the king of Maachah and his people; who came and pitched before Medeba. And the children of Ammon gathered themselves together from their cities, and came to battle.

18:4 Exodus 14:9 ; Judges 4:3 ; 1 Samuel 13:5 ; 2 Chronicles 14:9 ; Psalms 20:7-9

Thirty-two thousand soldiers, exclusive of the thousand send by the Maachah, are mentioned in the parallel passage (2 Sa 10:6 but of chariots or cavalry there is no mention; and the
number of chariots stated here is prodigious, and beyond all credibility. But as the word {raichev} denotes not only a chariot, but a rider, (see Isaiah 21:7, ,)it ought most probably to be rendered here, in a collective sense, cavalry; and then the number of troops will exactly agree with the passage in Samuel. It is probable that they were a kind of auxiliary troops who were usually mounted on horses, or in chariots, but who occasionally served as foot-soldiers.* the king of Maachah.
This variation exists only in the translation, the original being the same in both places, {melech machah,} "the king of Maachah."
2 Samuel 10:6

king Maachah
Numbers 21:30 ; Joshua 13:9 ; Isaiah 15:2