They have been told about you that you teach all the Jews who live among the Gentiles to abandon Moses, telling them not to circumcise their children or follow our customs.
In context
19After greeting them he described, one thing at a time, what God had done among the Gentiles through his ministry. 20When they heard it they praised God. Then they said to him: “You see, brother, how many thousands of believers there are among the Jews, and every one of them zealous for the law. 21They have been told about you that you teach all the Jews who live among the Gentiles to abandon Moses, telling them not to circumcise their children or follow our customs. 22What is to be done? They are bound to hear that you have come. 23So do what we tell you. We have four men here who are under a vow.