15 Beside that he had of the merchantmen, and of the traffick of the spice merchants, and of all the kings of Arabia, and of the governors  of the country.
15 not including the revenues from merchants and traders and from all the Arabian kings and the governors of the territories.
15 besides that which came from the explorers and from the business of the merchants, and from all the kings of the west and from the governors of the land.
15 This was above and beyond the taxes and profit on trade with merchants and assorted kings and governors.
15 besides that from the traveling merchants, from the income of traders, from all the kings of Arabia, and from the governors of the country.
15 This did not include the additional revenue he received from merchants and traders, all the kings of Arabia, and the governors of the land.
Matthew Henry's Commentary on 1 Kings 10:15
Commentary on 1 Kings 10:14-29
(Read 1 Kings 10:14-29)
Solomon increased his wealth. Silver was nothing accounted of. Such is the nature of worldly wealth, plenty of it makes it the less valuable; much more should the enjoyment of spiritual riches lessen our esteem of all earthly possessions. If gold in abundance makes silver to be despised, shall not wisdom, and grace, and the foretastes of heaven, which are far better than gold, make gold to be lightly esteemed? See in Solomon's greatness the performance of God's promise, and let it encourage us to seek first the righteousness of God's kingdom. This was he, who, having tasted all earthly enjoyments, wrote a book, to show the vanity of all worldly things, the vexation of spirit that attends them, and the folly of setting our hearts upon them: and to recommend serious godliness, as that which will do unspeakably more to make us happy, that all the wealth and power he was master of; and, through the grace of God, it is within our reach.