'Sabbath day' in the Bible

And it came about that on the Sabbath day he was going through the grain-fields; and while they were walking, his disciples took the heads of grain.

And they were watching him to see if he would make him well on the Sabbath day, so that they might have something against him.

And when the Sabbath day had come, he was teaching in the Synagogue; and a number of people hearing him were surprised, saying, From where did this man get these things? and, What is the wisdom given to this man, and what are these works of power done by his hands?