Contradiction with 1 Samuel 21:3-6
In Luke 6:3, Jesus refers to how David ate the consecrated bread, but 1 Samuel 21:3-6 specifies that the bread was only for the priests, highlighting the legal restriction violated by David which could be seen as contradictory to Jesus' implied approval.
1 Samuel 21:3-6: Now therefore what is under thine hand? give [me] five [loaves of] bread in mine hand, or what there is present. [present: Heb. found]