'Practice' in the Bible

For Ezra had set his heart to study the law of the Lord and to practice it, and to teach His statutes and ordinances in Israel.

Whoever refuses to practice the law of your God and the law of the king is to see judgment executed quickly, whether to death, banishment, confiscation of goods, or imprisonment.

Now when these things had been completed, the leaders approached me and said, "The people of Israel, the priests, and the Levites have not separated themselves from the local residents who practice detestable things similar to those of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.

should we violate your commandments by intermarrying with the nations who practice these abominations? Would you not be angry with us until you had consumed us, with not even a remnant surviving to escape?