The Son of Man is Lord of the Sabbath

1One Sabbath Jesus was going through the grainfields, and his disciples began to pick some heads of grain, rub them in their hands and eat the kernels. Some of the Pharisees asked, “Why are you doing what is unlawful on the Sabbath?” Jesus answered them, “Have you never read what David did when he and his companions were hungry? He entered the house of God, and taking the consecrated bread, he ate what is lawful only for priests to eat. And he also gave some to his companions.” Then Jesus said to them, “The Son of Man is Lord of the Sabbath.” (Luke 6:1-5)
Here we see Jesus and his disciples passing through the grainfields, his disciples picked some heads of grain, rubbed them in their hands and ate the kernels.  Some of the Pharisees said, “Why are you doing what is unlawful on the Sabbath?” Jesus then quoted from the Old Testament verses about David and his men entering the temple of God when they were hungry and eating consecrated bread which was lawful only for priests to eat.
It belongs to Aaron and his sons, who are to eat it in the sanctuary area, because it is a most holy part of their perpetual share of the food offerings presented to the Lord.” (Leviticus 24:9)
Here it says the consecrated bread was for the priests, Aaron, and his descendants to eat in the temple.
So the priest gave him the consecrated bread, since there was no bread there except the bread of the Presence that had been removed from before the Lord and replaced by hot bread on the day it was taken away. (1 Samuel 21:6)
Here the priests gave the consecrated bread from the temple to David and his men. consecrated bread was only for the priests to eat, but because David and his men were hungry, the priests gave them some to eat.
but the seventh day is a sabbath to the Lord your God. On it you shall not do any work, neither you, nor your son or daughter, nor your male or female servant, nor your animals, nor any foreigner residing in your towns. (Exodus 20:10)
This passage says that no work can be done on the Sabbath, but it doesn’t specify the details. Jewish tradition defined work, prohibiting many tasks including cooking.
If you enter your neighbor’s grainfield, you may pick kernels with your hands, but you must not put a sickle to their standing grain. (Deuteronomy 23:25)
This passage says that picking the kernels of your neighbor’s grainfield with your hands is permissible, but the Pharisees considered this as work.
Then he said to them, “The Sabbath was made for man, not man for the Sabbath. (Mark 2:27)
Here Jesus says that the Sabbath was made for man, to give them rest and for worshipping God, not as a burden or restriction that prohibits many activities.
Finally Jesus says: “The Son of Man is Lord of the Sabbath.” The Son of Man is Jesus Christ himself, he is the Son of God, he is the Lord of the Sabbath, and He has the authority to define the true purpose of the Sabbath.
May God bless you and your family!