John Calvin on Leviticus 25:32-38

32. Notwithstanding the cities of the Levites. Another exception, that the Levites should recover the houses they had sold, either by the right of redemption, or gratuitously in the year of jubilee. And this is not only appointed out of favor to them, but because it concerned the whole people, that they should be posted like sentries in the place which God had assigned to them. As to the suburbs, or the lands destined for the support of their cattle, God forbids their alienation, because thus they would have forsaken their proper station and removed elsewhere; whereas it was of importance to the whole people that such a dispersion should not occur.

Deuteronomy 20

Deuteronomy 20:19, 20

19. When thou shalt besiege a city a long time, in making war against it to take it, thou shalt not destroy the trees thereof by forcing an axe against them: for thou mayest eat of them, and thou shalt not cut them down, (for the tree of the field is man’s life,) to employ them in the siege:

19. Si obsederis urbem, diebus multis pugnando adversus eam, ut capias eam, non disperdes arbores ejus, impellendo in eas securim: quia ex illarum fructibus vesceris, propterea ipsas non succides: (quia an homo arbor agri ut ingrediatur a facie tua in munitionem?)

20. Only the trees which thou knowest that they be not trees for meat, thou shalt destroy and cut them down; and thou shalt build bulwarks against the city that maketh war with thee, until it be subdued.

20. Veruntamen arbores quas noveris non esse fructiferas, disperdes, et succides: et aedificabis munitionem adversus urbem illam quae tecum dimicat, donec descendat ipsa.