Mark 7:18

And He *said to them, “Are you so lacking in understanding also? Do you not understand that whatever goes into the man from outside cannot defile him,

Isaiah 28:9-10

“To whom would He teach knowledge,
And to whom would He interpret the message?
Those just weaned from milk?
Those just taken from the breast?

Jeremiah 5:4-5

Then I said, “They are only the poor,
They are foolish;
For they do not know the way of the Lord
Or the ordinance of their God.

Matthew 15:16-17

Jesus said, “Are you still lacking in understanding also?

Matthew 16:11

How is it that you do not understand that I did not speak to you concerning bread? But beware of the leaven of the Pharisees and Sadducees.”

Mark 4:13

And He *said to them, “Do you not understand this parable? How will you understand all the parables?

Luke 24:25

And He said to them, “O foolish men and slow of heart to believe in all that the prophets have spoken!

John 3:10

Jesus answered and said to him, “Are you the teacher of Israel and do not understand these things?

1 Corinthians 3:2

I gave you milk to drink, not solid food; for you were not yet able to receive it. Indeed, even now you are not yet able,

Hebrews 5:11

Concerning him we have much to say, and it is hard to explain, since you have become dull of hearing.

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