'Keep the Law' in the Bible

But there rose up, said they, some of the sect of the pharisees that believed, saying, that it was necessary to circumcise them, and enjoin them to keep the law of Moses.

Forasmuch as we have heard, that some who went out from us, have troubled you by their discourses, unsettling your minds, saying, ye must be circumcised, and keep the law; to whom we gave no such commission;