Luke 17:3

He said to the disciples, “It is impossible that no occasions of stumbling should come, but woe to him through whom they come!

It would be better for him if a millstone were hung around his neck, and he were thrown into the sea, rather than that he should cause one of these little ones to stumble.

If he sins against you seven times in the day, and seven times returns, saying, ‘I repent,’ you shall forgive him.”

The apostles said to the Lord, “Increase our faith.”

The Lord said, “If you had faith like a grain of mustard seed, you would tell this sycamore tree, ‘Be uprooted and be planted in the sea,’ and it would obey you.