Kommentar zu Divrej Hajamim II 20:7

and given it to the seed of Abraham Therefore, it is incumbent upon You to preserve it in their hands and to drive these peoples out. Even a flesh and blood king, and even an ordinary man, when he gives a present to his friend and someone comes to rob him of it, he exerts himself to preserve it in his hand. How much more so [should] You [do so]! Perhaps You will say, “I gave it to them only temporarily.” Therefore, it says, “forever.” You gave it to us for an eternal inheritance.