Matthew 15:12
Then the disciples came and said to him: do you know that the Pharisees were offended when they heard this saying? The disciples' concern about the Pharisees' offense is the concern of those who still see the Pharisees' approval as relevant. The were offended is the same root as the stumbling-block language of Matthew 11:6 and 13:57: the Pharisees stumbled over what Jesus taught.