Analysis of information sources in references of the Wikipedia article "Conquest" in English language version.
And in any case, a kingdom that went up against another kingdom until it completely uprooted its fellow nation and put others in their place, lo, that [newly instated] one has the status of a new kingdom, and, [in doing so], it has legally acquired its possession, just as they said, Ammon and Moab were purified in Sihon (Gittin 38a). What it has taken is valid and there is nothing left for the [original] owners, even if they had not despaired [of their loss].; Ibn Abi-Zimra, David (1749). David Ashkenazi (ed.). The Responsa of the Radbaz (in Hebrew). Vol. 1. Venice. pp. 78–79., s.v. Part III, responsum no. 533 (reprinted in Israel, n.d.)