NET
13 For you have heard of my former way of life in Judaism, how I was savagely persecuting the church of God and trying to destroy it.
Darby
13 For ye have heard [what was] my conversation formerly in Judaism, that I excessively persecuted the assembly of God, and ravaged it;
KJV
13 For ye have heard of my conversation in time past in the Jews' religion, how that beyond measure I persecuted the church of God, and wasted it: