VANITY, Foolish questions are

1 Timothy 1:6-7

6. From which some having swerved have turned aside unto vain jangling;

7. Desiring to be teachers of the law; understanding neither what they say, nor whereof they affirm.

1 Timothy 6:20

20. O Timothy, keep that which is committed to thy trust, avoiding profane and vain babblings, and oppositions of science falsely so called:

2 Timothy 2:14-16

14. Of these things put them in remembrance, charging them before the Lord that they strive not about words to no profit, but to the subverting of the hearers.

15. Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.

16. But shun profane and vain babblings: for they will increase unto more ungodliness.

Titus 3:9

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