Acts 21:20-21

20 And when they heard it, they glorified the Lord and said unto him, Thou seest, brother, how many thousands of Jews there are who have believed, and they are all zealous of the law;

21 and they are informed of thee that thou teachest all the Jews who are among the Gentiles to forsake Moses, saying that they ought not to circumcise their children, neither to walk after the customs.