'On the Sabbath' in the Bible

And they go into Capernaum. And straightway on the sabbath, he went into the synagogue and taught.

And he went thro' the corn-fields on the sabbath day: and his disciples as they went, plucked the ears of corn.

And the Pharisees said to him, Behold, why do they on the sabbath that which is not lawful?

And they watched him, whether he would heal him on the sabbath, that they might accuse him.

And he saith to them, Is it lawful to do good on the sabbath, or to do evil? To save life or to kill?

And on the sabbath he taught in the synagogue, and many hearing were astonished, saying, Whence hath this man these things? And what wisdom is this that is given him, that such mighty works are wrought by his hands?