Matt 7 23  Then I will tell them plainly, 'I never knew you. Away from me, you evildoers!'
Ps 6 8Away from me, all you who do evil,
for the LORD has heard my weeping.

I can just imagine Jesus praying Psalm 6 as the person who sends the Pharisees away by pronouncing the Psalms in quietness. I surmise that he knew exactly who was abusing the poor and the helpless and He came upon a group of them . This would be just a natural pronouncement to them in defense of His people. Away to hell your life is through.