'Sabbath day' in the Bible

Then they returned to Jerusalem from the mountain called Olivet, which is near Jerusalem, a Sabbath day's journey away.

But they, passing on from Perga, came to Antioch of Pisidia. They went into the synagogue on the Sabbath day, and sat down.

On the Sabbath day we went forth outside of the city by a riverside, where we supposed there was a place of prayer, and we sat down, and spoke to the women who had come together.