Scripture does not repeat itself in vain. This is something that is very important for us to catch. It is emphasized by the repetition, that God did not simply warn his people of the consequences, and encourages people with the consequences of obedience on the one hand—encouragement; or disobedience on the other hand—warning. He did not just warn his people, and he was not just patient with his people for centuries, but he did fullfil his threat. The promises of God are sure; the threats of God are sure; and even the promises that threaten are sure. And there comes a time when God knows where those lines are [when the threat becomes reality], we do not. We best be obedient every day than to presume on the [favour of the] Lord. When God says that is enough, then in some way we will find cursing.1
William Harrell
15 The LORD, the God of their fathers, sent persistently to them by his messengers, because he had compassion on his people and on his dwelling place.