Or HaChaim on Leviticus 26:32/אור החיים על ויקרא כ״ו:ל״ב

1 והשמותי אני את הארץ, "And I will make the land desolate, etc." The reason the Torah uses the word אני although it is implied in the word והשמותי is to identify the Attribute of G'd causing this desolation. It is the attribute of mercy. Torat Kohanim explains that the desolation of the land is intended to deny our enemies the pleasure of what had been our land before they conquered it.