John Gill Commentary Psalms 83:12

"Who said, Let us take to ourselves in possession The habitations of God." — Psalms 83:12 (ASV)

Who said
Not the kings and princes of Midian just mentioned, but the confederate enemies of Israel, named (Psalms 83:6–8) , to whom the like things are wished as to the Midianites and others, because they said what follows:

let us take to ourselves the houses of God in possession ;
not only the temple, which was eminently the house of God, but all the habitations of the Israelites in Jerusalem, and other places, where the Lord vouchsafed to dwell; unless this should be ironically spoken by their enemies calling them so, because they pretended, as they reckoned it, to have and to hold them by the gift of God; whereas, of right, they belonged to them, at least some of them: such a claim was made by the Ammonites in the times of Jephthah, (Judges 11:13) , and to dispossess the Israelites was the intention of the Ammonites and Moabites in the times of Jehoshaphat, (2 Chronicles 20:10 2 Chronicles 20:11) .