'Lawful' in the Bible

But the Pharisees, seeing it, said to him, Behold, thy disciples are doing what is not lawful to do on sabbath.

How he entered into the house of God, and ate the shewbread, which it was not lawful for him to eat, nor for those with him, but for the priests only?

And behold, there was a man having his hand withered. And they asked him, saying, Is it lawful to heal on the sabbath? that they might accuse him.

How much better then is a man than a sheep! So that it is lawful to do well on the sabbath.

For John said to him, It is not lawful for thee to have her.

And the Pharisees came to him tempting him, and saying, Is it lawful for a man to put away his wife for every cause?

is it not lawful for me to do what I will in my own affairs? Is thine eye evil because I am good?

tell us therefore what thou thinkest: Is it lawful to give tribute to Caesar, or not?

And the chief priests took the pieces of silver and said, It is not lawful to cast them into the Corban, since it is the price of blood.