“And they are informed of thee, that thou teachest all the Iewes which are among the Gentiles, to forsake Moses, saying, that they ought not to circumcise their children, neither to walke after the customes.”
1611 King James Version (KJV)
21:21 They have been informed concerning thee, that thou teachest the Jews - not to circumcise their children, nor to walk after the customs - Of the Mosaic law. And so undoubtedly he did. And so he wrote to all the Churches in Galatia, among whom were many Jews. Yea, and James himself had long before assented to Peter, affirming before all the apostles and all the brethren, #Acts 15:10|, That this very law was a yoke which (said he) neither our fathers nor we were able to bear - Amazing! that they did not know this! Or, that if they did, they did not openly testify it at all hazards, to every Jewish convert in Jerusalem!
Ac 21:21 That thou teachest, etc. Paul, in advance of the rest, had learned that the Jewish forms were not to be imposed upon Gentiles, were not an obligation upon Jewish Christians, but he still observed them, at least in part, himself, and so far from bidding Jewish brethren to forsake Moses, he circumcised Timothy (Ac 16:3), and said, "Let every man abide in the same calling (whether Jew or Gentile) in which he is called". Read the whole connection of 1Co 7:18-20. He had not, therefore, taught "Jews to forsake Moses, saying that they ought not to circumcise their children, neither to walk after the customs".