Deuteronomy 4:29-31

But even there you can look for the LORD your God, and you will find him if you look for him with your whole being. It will be hard when all these things happen to you. But after that you will come back to the LORD your God and obey him, because the LORD your God is a merciful God. He will not leave you or destroy you. He will not forget the Agreement with your ancestors, which he swore to them.