Sforno on Deuteronomy 29:14/ספורנו על דברים כ״ט:י״ד

1ואת אשר עמנו פה עמנו היום, a reference to future, as yet unborn generations. You will therefore have to explain to these unborn generations in due course that you yourselves only received this land on the understanding that subsequent generations of Jews would remain loyal to the terms of your acceptance. They will continue to inherit the land from you only on that basis.