Sennacherib the wicked invaded Jewry with forty-five thousand princes in golden coronets, and they had with them their wives and odalisques; also eighty thousand mighty men clad in mail and sixty thousand swordsmen ran before him, and the rest were cavalry. With a similar army they came against r Abraham, and a like force is to come up with Gog and Magog. A tradition teaches that the extent of his camp was four hundred parsaes or leagues, the extent of the horses' necks were forty parsaes. The total muster of his army was two hundred and sixty myriads of thousands, less one. Abaii asked, " Less one myriad, or one thousand, or one hundred? or more literally less one?"
The Size of Sennacherib's Army Against Jerusalem
Sanhedrin 95b