Three hundred years Not precisely, but about that time, either from their coming out of Egypt, or from their first conquest of those lands. Here he pleads prescription, which by all men is reckoned a just title, and it is fit it should be so, for the good of the world; because otherwise a door would be opened both to kings and private persons for infinite contentions and confusions. And the prescription he pleads was for a long space of time, during which none of the kings of Moab or Ammon had pretended a right to this country, much less contested it with them. Wherefore did ye not recover them within that time? No answer could be given to this question, why, in so long a time, they never asserted their claim till now.
Related Commentaries of Judges 11:26
Judges 11:26
26 While Israel dwelt in Heshbon and her towns, and in Aroer and her towns, and in all the cities that be along by the coasts of Arnon, three hundred years? why therefore did ye not recover them within that time?