Technicalities
The umbrella collects two scenes from Luke where the Pharisees press a legal technicality against Jesus and his disciples — Sabbath-violation as a charge built on a strict reading of what counts as work.
"Why Do You⁺ Do That Which Is Not Lawful?"
When the disciples pluck heads of grain on the Sabbath, the Pharisees raise the technical objection at once: "But certain of the Pharisees said, Why do you⁺ do that which is not lawful on the Sabbath day?" (Luke 6:2). The act itself is small — picking and rubbing grain — but the legal frame makes it work, and so unlawful.
Watching for an Accusation
The next Sabbath the same legal frame is in play, this time over healing: "And the scribes and the Pharisees watched him, whether he would heal on the Sabbath; that they might find how to accuse him" (Luke 6:7). The watching is forensic. The technicality has shifted from harvesting to medicine, but the strategy is the same — find an act that the Sabbath rule can be made to forbid, and bring the charge.