I myself was once convinced that I had to do everything I could against the name of Jesus the Nazarene.
In context
7the promise our twelve tribes hope to see fulfilled as they worship with all earnestness night and day. It is for this hope, Your Majesty, that I am accused by Jews. 8Why should any of you find it incredible that God raises the dead? 9I myself was once convinced that I had to do everything I could against the name of Jesus the Nazarene. 10That is what I did in Jerusalem: with authority from the chief priests I locked up many of the saints in prison, and when they were put to death I cast my vote against them. 11Time and again, in one synagogue after another, I punished them and tried to force them to blaspheme; in my raging fury against them I hunted them even in foreign cities.