The Gospel According to Luke 16:15-18; 17:1-4
The Lord said to the Jews who came to him, "You are those who justify yourselves before men, but God knows your hearts; for what is exalted among men is an abomination in the sight of God. The law and the prophets were until John; since then the good news of the kingdom of God is preached, and every one enters it violently. But it is easier for heaven and earth to pass away, than for one dot of the law to become void. Every one who divorces his wife and marries another commits adultery, and he who marries a woman divorced from her husband commits adultery."
And he said to his disciples, "Temptations to sin are sure to come; but woe to him by whom they come! It would be better for him if a millstone were hung round his neck and he were cast into the sea, than that he should cause one of these little ones to sin. Take heed to yourselves; if your brother sins, rebuke him, and if he repents, forgive him; and if he sins against you seven times in the day, and turns to you seven times, and says, 'I repent,' you must forgive him."