'Sabbath Day' in the Bible

At that time Jesus went through the grain fields on the sabbath day. And His disciples were hungry, and began to pluck the heads of grain and to eat.

But when the Pharisees saw, they said to Him, Behold, your disciples do that which it is not lawful to do on the sabbath day.

Or have you not read in the Law that on the sabbath days the priests in the temple profane the sabbath and are blameless?

How much better is a man then than a sheep? Therefore it is lawful to do well on the sabbath days.

But pray that your flight is not in the winter, nor on the sabbath day;