Sforno on Deuteronomy 29:3/ספורנו על דברים כ״ט:ג׳

1ולא נתן ה' לכם לב לדעת, even though He had tried by means of His teachings and His miracles to give the people a knowing heart, as we know from Exodus 10,20ולמען תספר.....וידעתם כי אני ה', “and in order that you will tell…and be aware that I am the Lord,” the lesson had not taken hold due to your overwhelming quarrelsomeness.