3 Jesus replied, “Haven’t you read in the Scriptures what David did when he and his companions were hungry? 4 He went into the house of God and broke the law by eating the sacred loaves of bread that only the priests can eat. He also gave some to his companions.” 5 And Jesus added, “The Son of Man[a] is Lord, even over the Sabbath.” (Luke 6;1-5 NLT)
The religious leaders of Jesus' time had build up a whole series of rules to keep people from breaking the commandments. They turned these rules into laws . But they were human definitions or additions to God's Laws. They placed limitations on what people could do to prevent them from breaking the "Sabbath".
Jesus challenged these man made rules and said that He is the Lord of the Sabbath. He emphasized living as God's people every day of the week and helping people who needed assistance even on the Sabbath.
We are free to worship the Lord any day of the week. We have to be careful that we do not elevate human rules and regulations to the level of God's Laws. As Peter and John told the members of the Jewish High Court who wanted to keep them from talking about Jesus, "We must obey God rather than men."