'Sabbath day' in the Bible

And it came to pass, that He was traveling through the corn-fields on the Sabbath-day; and His disciples began to make the journey plucking the ears.

and it being the Sabbath day, He began to preach in the synagogue: and many hearing were astonished, saying, Whence are these things to this one? and, What wisdom is given unto Him? Such miracles are wrought by His hands.