Luke 17:1-6
17 He said to His disciples, “It is inevitable that stumbling blocks come, but woe to him through whom they come! 2 It would be better for him if a millstone were hung around his neck and he were thrown into the sea, than that he would cause one of these little ones to stumble. 3 Be on your guard! If your brother sins, rebuke him; and if he repents, forgive him. 4 And if he sins against you seven times a day, and returns to you seven times, saying, ‘I repent,’ forgive him.”
5 The apostles said to the Lord, “Increase our faith!” 6 And the Lord said, “If you had faith like a mustard seed, you would say to this mulberry tree, ‘Be uprooted and be planted in the sea’; and it would obey you.