'Is It Lawful' in the Bible

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

Pharisees came to Jesus to test Him [intending to trick Him into saying something wrong], and asked Him, “Is it lawful [according to Scripture] for a man to divorce his wife and send her away?”

They came and said to Him, “Teacher, we know that You are truthful and have no personal bias toward anyone; for You are not influenced by outward appearances or social status, but in truth You teach the way of God. Is it lawful [according to Jewish law and tradition] to pay the poll-tax to [Tiberius] Caesar, or not?