1 Kings 10:29
And a chariot came up and went out of Egypt for six hundred shekels of silver, and an horse for an hundred and fifty: and so for all the kings of the Hittites, and for the kings of Syria, did they bring them out by their means.
Cross-reference
2 Chronicles 1:16
Parallel
2 Chronicles 1:16 gives the same account of Solomon importing horses from Egypt and Kue, confirming the trade.