'Keep' in the Bible

Now, O Lord God of Israel, keep the promise you made to your servant, my father David, when you said, 'You will never fail to have a successor ruling before me on the throne of Israel, provided that your descendants watch their step and obey my law as you have done.'

"But if you people ever turn away from me, fail to obey the regulations and rules I instructed you to keep, and decide to serve and worship other gods,