'Lawful' in the Bible

But some of the Pharisees said, “Why do you do what is not lawful on the Sabbath?”

how he entered the house of God, and took and ate the consecrated bread which is not lawful for any to eat except the priests alone, and gave it to his companions?”

And Jesus said to them, “I ask you, is it lawful to do good or to do harm on the Sabbath, to save a life or to destroy it?”

And Jesus answered and spoke to the lawyers and Pharisees, saying, “Is it lawful to heal on the Sabbath, or not?”

Is it lawful for us to pay taxes to Caesar, or not?”