'Sabbath day' in the Bible

Then they returned to Jerusalem from a mount called Olivet, which is near Jerusalem, a sabbath day's journey.

But they, passing through from Perga, came to Antioch in Pisidia; and, entering into the synagogue on the sabbath day, they sat down.

And, on the sabbath day, we went forth without the gate by a river, where we were supposing there was a place of prayer; and, sitting down, we were speaking to the women who had assembled together.