Luke 6:46
Why do you call me, Lord, Lord, and do not do what I say? — the Lord-Lord address is the most basic form of Christological confession — acknowledging Jesus' lordship. The pointed question is the sermon's diagnostic: the one who calls Jesus Lord but does not do what he says has a fundamental contradiction in their discipleship. Calling Lord without doing is the verbal form of the plank/speck hypocrisy — profession without practice.