Matthew 15:16-17

15:16 Jesus said, “Even after all this, are you still so foolish? 15:17 Don’t you understand that whatever goes into the mouth enters the stomach and then passes out into the sewer?

Mark 7:18

7:18 He said to them, “Are you so foolish? Don’t you understand that whatever goes into a person from outside cannot defile him?

Luke 24:25-27

24:25 So he said to them, “You foolish people – how slow of heart to believe all that the prophets have spoken! 24:26 Wasn’t it necessary for the Christ to suffer these things and enter into his glory?” 24:27 Then beginning with Moses and all the prophets, he interpreted to them the things written about himself in all the scriptures.

Revelation 3:19

3:19 All those I love, I rebuke and discipline. So be earnest and repent!