'Sabbath day' in the Bible

And He came to Nazareth, where He had been brought up; and He went, according to His custom, into the synagogue on the sabbath day, and stood up to read.

But the synagogue-ruler, answering, (being much displeased that Jesus healed her on the sabbath), said to the multitude, "There are six days in which it behooves us to work; in these, therefore, coming, be healed, and not on the sabbath day."

and He said to them, "Who of you shall have an ass or an ox fall into a well, and he will not straight-way draw him up on a sabbath day?"