'Forty' in the Bible

The days that David reigned over Israel [were] forty years; he reigned seven years in Hebron and thirty-three years in Jerusalem.

Now Solomon had forty thousand stalls of horses for his war chariots and twelve thousand horsemen.

The main hall of the temple was forty cubits {in front of the inner sanctuary},

He also made ten bronze basins, [each] holding forty baths; each basin [was] four cubits, one basin on each of the ten stands.

All the days that Solomon reigned in Jerusalem over all of Israel [were] forty years.

So he got up, ate, drank, and went in the strength of that food forty days and forty nights up to Horeb, the mountain of God.