'Illegal' in the Bible

In all cases of illegal possessions, whether for an ox, a donkey, a sheep, a garment, or any kind of lost item, about which someone says 'This belongs to me,' the matter of the two of them will come before the judges, and the one whom the judges declare guilty must repay double to his neighbor.

When the High Priests had gathered up the money they said, "It is illegal to put it into the Treasury, because it is the price of blood."

so the Jews said to the man who had been healed, “This is the Sabbath! It’s illegal for you to pick up your mat.”