Deuteronomy 17:16 (Go to this verse :: Verse pop-up)
Given the size and scope of the empire he inherited from his father David, Solomon no doubt needed means for transportation and trade. Beyond this, horses were prime war materiel in those days, particularly for pulling chariots, so multiplying horses can indicate territorial aggression and a warlike spirit. Most importantly, it can show a lack of faith in God and too great a faith in armies.
I Kings 10:26, 28 says that Solomon had thousands of horses imported from Egypt. The next verse reveals further proof of his departure from these royal guidelines: He also imported chariots and sold horses and chariots to other nations. What surfaces here is nothing more than a tenth-century BC arms race! Solomon armed the Hittites and Syria, providing them with the means to attack Israel and Judah in later years (I Kings 11:23-25; 20:1; II Chronicles 22:5). In so doing, he violated one of the "smaller" precepts of God's law, first given to Israel 450 years earlier.
Martin G. Collins
The Enduring Results of Compromise