I will make the land [so] desolate — This is [actually] a kindly measure for Israel, for their enemies will not find any satisfaction in their land, for it will be desolate of its inhabitants.
Notes from Wikiquote
Numbers
A falsehood in which some truth is not stated at the beginning, cannot be maintained in the end.
From here [we derive] that one should not maintain a dispute."
Quote text and notes from Wikiquote: Rashi (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.