A Promise To Never Leave
There is no such thing as perfect people and so as people's promises. They might make it happen or don't mind it at all. That is very unlikely to God - for God is faithful and so as His promises. In Deuteronomy 31:6 says, "Be strong and courageous. Do not be afraid or terrified because of them, for the Lord your God is with you wherever you may go. He will never leave you nor forsake you."