'Sabbath day' in the Bible

And the sons of Israel are in the wilderness, and they find a man gathering wood on the sabbath-day,

'And on the sabbath-day, two lambs, sons of a year, perfect ones, and two-tenth deals of flour, a present, mixed with oil, and its libation;

This is the burned offering for every Sabbath day, in addition to the regular burned offering, and its drink offering.