'Zealous' in the Bible

They, when they heard it, glorified God. They said to him, "You see, brother, how many thousands there are among the Jews of those who have believed, and they are all zealous for the law.

"I am indeed a Jew, born in Tarsus of Cilicia, but brought up in this city at the feet of Gamaliel, instructed according to the strict tradition of the law of our fathers, being zealous for God, even as you all are this day.