In 2 Chronicles 9:25, the number of stalls for Solomon's chariot horses is stated at 4,000, instead of 40,000. The number in the present passage is probably a corruption. Solomon's chariots were but 1,400 1 Kings 10:26; 2 Chronicles 1:14, for which 40,000 horses could not possibly be required. The Assyrian chariots had at most three horses apiece, while some had only two. 4,000 horses would supply the full team of three to 1,200, and the smaller team of two to 200 chariots. The number 4,000 is in due proportion to the 12,000 horses for cavalry, and is in accordance with all that we know of the military establishments of the time and country. Compare 2 Chronicles 12:3; 2 Samuel 8:4.

1 Kings 4:26 Parallel Commentaries

Adam and Zaretan, Joshua 3
I suspect a double error in some maps, while they place these two towns in Perea; much more, while they place them at so little a distance. We do not deny, indeed, that the city Adam was in Perea; but Zaretan was not so. Of Adam is mention, Joshua 3:16; where discourse is had of the cutting-off, or cutting in two, the waters of Jordan, that they might afford a passage to Israel; The waters rose up upon a heap afar off in Adam. For the textual reading "In Adam," the marginal hath "From Adam." You …
John Lightfoot—From the Talmud and Hebraica