Luke
Luke 18:6BSB·traditional attribution

And the Lord said, “Listen to the words of the unjust judge.

Matthew Henry Presbyterian @wholebiblehenry

This parable has its key hanging at the door; the drift and design of it are prefixed. Christ spoke it with this intent, to teach us that men ought always to pray and not to faint, Luk 18:1. It supposes that all God's people are praying people; all God's children keep up both a constant and an occasional correspondence with him, send to him statedly, and upon every emergency.

Commenting on Luke 18:1-8

John Gill Reformed Baptist @doctorgill

And the Lord said,.... The Lord Jesus Christ, who delivered out this parable to his disciples: hear what the unjust judge saith; and take encouragement from hence to be frequent and importunate in prayer with God; for if such a cruel, merciless, and unjust judge is to be wrought upon by importunity to do justice, who has no principle to influence him, how much more...

Albert Barnes Presbyterian @notesbybarnes

Verse 6. Hear, &c. Give attention to this, and derive from it practical instruction.