Paul uses a question for emphasis. The word "Israel" refers to the people who lived in the nation of Israel. AT: "Again I tell you the people of Israel did know the message." (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-metonymy]])
This means that Moses wrote down what God said. "I" refers to God, and "you" refers to the Israelites. AT: "First Moses says that God will provoke you...God will stir you up...." (See: [[rc://en/ta/man/translate/figs-you]], [[rc://en/ta/man/translate/figs-quotations]])