Remember, the full list of FTV's can always be found at this link. The // in the verse marks the minimum number of words you need from the FTV to uniquely identify it.
QUESTION: And he said: // "I tell you…
ANSWER: ...the truth, unless you change and become like little children, you will never enter the kingdom of heaven. Therefore, whoever humbles himself like this child is the greatest in the kingdom of heaven." (Matthew 18:03-04 )
ANSWER: ...of these little ones who believe in me to sin, it would be better for him to have a large millstone hung around his neck and to be drowned in the depths of the sea. (Matthew 18:06 )