And the Philistines gathered themselves together to fight with Israel, thirty thousand chariots, and six thousand horsemen, and people as the sand which is on the sea shore in multitude: and they came up, and pitched in Michmash, eastward from Bethaven. Thirty thousand chariots, and six thousand horsemen - There is no proportion here between the chariots and the cavalry. The largest armies ever brought into the field, even by mighty emperors, never were furnished with thirty thousand chariots.
I think שלשים sheloshim, Thirty, is a false reading for שלש shalosh, Three. The Syriac has telotho alpin, and the Arabic thalathato alf, both signifying Three thousand; and this was a fair proportion to the horsemen. This is most likely to be the true reading.