'Sabbath day' in the Bible

And the burnt-offering that the prince shall offer to the LORD in the sabbath day shall be six lambs without blemish, and a ram without blemish.

Now when the prince shall prepare a voluntary burnt-offering or peace-offerings voluntarily to the LORD, one shall then open to him the gate that looketh towards the east, and he shall prepare his burnt-offering and his peace-offerings, as he did on the sabbath-day: then he shall go forth; and after his going forth one shall shut the gate.