Solomon had 4,000 stalls for his chariot horses and 12,000 horses.
Such a kingdom, and such a court, surely never any prince had, as Solomon's are here described to be. I. Such a kingdom. Never did the crown of Israel shine so brightly as it did when Solomon wore it, never in his father's days, never in the days of any of his successors; nor was that kingdom ever so glorious a type of the kingdom...
Commenting on 1 Kings 4:20-28
And God gave Solomon wisdom and understanding exceeding much,.... In things natural, moral, divine, and spiritual, and that not slight and superficial, but exceeding deep, and large beyond expression; and this he had not from the acuteness of his genius merely, nor from his industry and diligence; but by the gift of God, as whatsoever solid wisdom and understanding is in any man, it is...
forty thousand stalls--for the royal mews (see on Ch2 9:25).