"Remember the Sabbath day, to keep it holy" (Hebrew: זָכוֹר אֶת יוֹם הַשַׁבָּת לְקַדְּשׁוֹ, romanized: Zāḵōr ’eṯ-yōm haš-šabbāṯ lə-qaddəšō) is one of the Ten Commandments[1] found in the Torah.
Remember the Sabbath day, to keep it holy. Six days you shall labor, and do all your work, but the seventh day is the Sabbath of the LORD your God. In it you shall not do any work, you, or your son, or your daughter, your male servant, or your female servant, or your livestock, or the sojourner who is within your gates. For in six days the LORD made heaven and earth, the sea, and all that is in them, and rested on the seventh day. Therefore the LORD blessed the Sabbath day and made it holy. — Exodus, 20:8-11
The Day of Atonement was regarded as a "Sabbath of Sabbaths" [17] It was on this day alone that the High Priest of Israel entered the Holy of Holies inside the Tabernacle where the Ark of the Covenant contained the stone tablets on which the Ten Commandments were engraved. The presence of YHWH in the Holy of Holies on that yearly day, upon the mercy seat, required that the Kohen Gadol be first purified by the sacrifice of a bull in a prescribed manner. Entering the Most Holy Place on other days or without fulfilling the ritual requirements would subject the priest to death.
At that time Jesus went through the grainfields on the Sabbath. His disciples were hungry and began to pick some heads of grain and eat them. When the Pharisees saw this, they said to him, "Look! Your disciples are doing what is unlawful on the Sabbath."He answered, "Haven't you read what David did when he and his companions were hungry? He entered the house of God, and he and his companions ate the consecrated bread—which was not lawful for them to do, but only for the priests. Or haven't you read in the Law that on the Sabbath the priests in the temple desecrate the day and yet are innocent? I tell you that one greater than the temple is here. If you had known what these words mean, 'I desire mercy, not sacrifice,' you would not have condemned the innocent. For the Son of Man is Lord of the Sabbath."
Going on from that place, he went into their synagogue, and a man with a shriveled hand was there. Looking for a reason to accuse Jesus, they asked him, "Is it lawful to heal on the Sabbath?" He said to them, "If any of you has a sheep and it falls into a pit on the Sabbath, will you not take hold of it and lift it out? How much more valuable is a man than a sheep! Therefore it is lawful to do good on the Sabbath."
Then he said to the man, "Stretch out your hand." So he stretched it out and it was completely restored, just as sound as the other. But the Pharisees went out and plotted how they might kill Jesus. — Matthew 12:1-14 NIV