'Lawful' in the Bible

The Pharisees were saying to Him, “Look, why are they doing what is not lawful on the Sabbath?”

how he entered the house of God in the time of Abiathar the high priest, and ate the consecrated bread, which is not lawful for anyone to eat except the priests, and he also gave it to those who were with him?”

And He *said to them, “Is it lawful to do good or to do harm on the Sabbath, to save a life or to kill?” But they kept silent.

For John had been saying to Herod, “It is not lawful for you to have your brother’s wife.”

Some Pharisees came up to Jesus, testing Him, and began to question Him whether it was lawful for a man to divorce a wife.

They *came and *said to Him, “Teacher, we know that You are truthful and defer to no one; for You are not partial to any, but teach the way of God in truth. Is it lawful to pay a poll-tax to Caesar, or not?