This Bible contradiction is from the Skeptic's Annotated Bible.
Solomon had 40,000 stalls.
1 Kings 4:26 View context
And Solomon had forty thousand stalls of horses for his chariots, and twelve thousand horsemen.
Solomon had 4,000 stalls.
2 Chronicles 9:25 View context
And Solomon had four thousand stalls for horses and chariots, and twelve thousand horsemen; whom he bestowed in the chariot cities, and with the king at Jerusalem.