'Sabbath Day' in the Bible

And the burnt offering that the prince shall offer unto the LORD on 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 unto the LORD, one shall then open him the gate that faces toward the east, and he shall prepare his burnt offering and his peace offerings, as he did on the sabbath day: then he shall go out; and after his going out one shall shut the gate.