1 Samuel 13:5

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.