Mark 7:18

And he said to them, "So are you also without understanding? Do you not understand that everything [that is] outside that goes into a person [is] not able to defile him?

Isaiah 28:9-10

[To] whom will he teach knowledge, and [to] whom will he explain [the] message? Those who are weaned from milk, [those] taken from [the] breast?

Jeremiah 5:4-5

Then I said, "[They are] just simple people, they are foolish, for they know not the way of Yahweh, the law of their God.

Matthew 15:16-17

But he said, "Are you also still without understanding?

Matthew 16:11

How do you not understand that I did not speak to you about 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? And how will you understand all the parables?

Luke 24:25

And he said to them, "O foolish and slow in 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 you 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 eat it]. But now you are still not able,

Hebrews 5:11

Concerning this {we have much to say and it is difficult to explain}, since you have become sluggish in hearing.

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