'On the Sabbath' in the Bible

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

And it came to pass that he went on the sabbath through the cornfields; and his disciples began to walk on, plucking the ears.

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

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

And he says to them, Is it lawful on the sabbath to do good or to do evil, to save life or to kill? But they were silent.