¹At that time Jesus went through the grainfields on the Sabbath. His disciples were hungry, and they began to pluck heads of grain and to eat. ²But when the Pharisees saw it, they said to him, “Look, your disciples are doing what is not lawful to do on the Sabbath.” ³He said to them, “Have you not read what David did when he was hungry, and those who were with him: ⁴how he entered the house of God and ate the bread of the Presence, which it was not lawful for him to eat nor for those who were with him, but only for the priests? ⁵Or have you not read in the Law how on the Sabbath the priests in the temple profane the Sabbath and are guiltless? ⁶I tell you, something greater than the temple is here. ⁷And if you had known what this means, ‘I desire mercy, and not sacrifice,’ you would not have condemned the guiltless. ⁸For the Son of Man is lord of the Sabbath.” (Matthew 12:1-8)

Starting with Matthew 12:1, there are two event of Jesus in Sabbath. He gives grace in Sabbath, and he works in Sabbath. In fact, he is the lord of the Sabbath (v.8). That’s the reason why he can promise rest under his yoke (Mat 11:28).