Deuteronomy 3:4

And we Cook all his cities at that time, that is, the fortified towns; there was not a city which we took not from them, threescore cities, all the region of Argob, the northeastern section of this territory, 1 Kings 4:13, about forty miles northeast of the Sea of Galilee, the entire kingdom sometimes being included in the name Argob, the kingdom of Og in Bashan; for these sixty cities may be said to have been the very heart of the country.