Verses with the word foolish in the New Testament (17 verses):

Matthew 7:26
And every one that heareth these sayings of mine, and doeth them not, shall be likened unto a foolish man, which built his house upon the sand:

Matthew 25:2
And five of them were wise, and five were foolish.

Matthew 25:3
They that were foolish took their lamps, and took no oil with them:

Matthew 25:8
And the foolish said unto the wise, Give us of your oil; for our lamps are gone out.

Romans 1:21
Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.

Romans 2:20
An instructor of the foolish, a teacher of babes, which hast the form of knowledge and of the truth in the law.

Romans 10:19
But I say, Did not Israel know? First Moses saith, I will provoke you to jealousy by them that are no people, and by a foolish nation I will anger you.

1 Corinthians 1:20
Where is the wise? where is the scribe? where is the disputer of this world? hath not God made foolish the wisdom of this world?

1 Corinthians 1:27
But God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty;

Galatians 3:1
O foolish Galatians, who hath bewitched you, that ye should not obey the truth, before whose eyes Jesus Christ hath been evidently set forth, crucified among you?

Galatians 3:3
Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?

Ephesians 5:4
Neither filthiness, nor foolish talking, nor jesting, which are not convenient: but rather giving of thanks.

1 Timothy 6:9
But they that will be rich fall into temptation and a snare, and into many foolish and hurtful lusts, which drown men in destruction and perdition.

2 Timothy 2:23
But foolish and unlearned questions avoid, knowing that they do gender strifes.

Titus 3:3
For we ourselves also were sometimes foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, and hating one another.

Titus 3:9
But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain.

1 Peter 2:15
For so is the will of God, that with well doing ye may put to silence the ignorance of foolish men: