'Keep His Commandments' in the Bible

This is how we know that we know him: if we keep his commandments.

One who says, "I know him," and doesn't keep his commandments, is a liar, and the truth isn't in him.

and whatever we ask, we receive from him, because we keep his commandments and do the things that are pleasing in his sight.

By this we know that we love the children of God, when we love God and keep his commandments.

For this is the love of God, that we keep his commandments. His commandments are not grievous.