Luke 17
1 Then said he unto the disciples, It is impossible but that offences will come: but woe unto him, through whom they come! 2 It were better for him that a millstone were hanged about his neck, and he cast into the sea, than that he should offend one of these little ones. 3 Take heed to yourselves: If thy brother trespass against thee, rebuke him; and if he repent, forgive him.

Luke 20
1 And it came to pass, that on one of those days, as he taught the people in the temple, and preached the gospel, the chief priests and the scribes came upon him with the elders, 2 And spake unto him, saying, Tell us, by what authority doest thou these things? or who is he that gave thee this authority? 3 And he answered and said unto them, I will also ask you one thing; and answer me:

Luke 18
1 And he spake a parable unto them to this end, that men ought always to pray, and not to faint; 2 Saying, There was in a city a judge, which feared not God, neither regarded man: 3 And there was a widow in that city; and she came unto him, saying, Avenge me of mine adversary.