Acts 21:20

20 On hearing it, they praised God; but they also said to him, "You see, brother, how many tens of thousands of believers there are among the Judeans, and they are all zealots for the Torah.

Acts 21:20 In-Context

18 The next day Sha'ul and the rest of us went in to Ya'akov, and all the elders were present.
19 After greeting them, Sha'ul described in detail each of the things God had done among the Gentiles through his efforts.
20 On hearing it, they praised God; but they also said to him, "You see, brother, how many tens of thousands of believers there are among the Judeans, and they are all zealots for the Torah.
21 Now what they have been told about you is that you are teaching all the Jews living among the Goyim to apostatize from Moshe, telling them not to have a b'rit-milah for their sons and not to follow the traditions.
22 "What, then, is to be done? They will certainly hear that you have come.
Complete Jewish Bible Copyright 1998 by David H. Stern. Published by Jewish New Testament Publications, Inc. All rights reserved. Used by permission.