Psalm 66:18

Iniquity, if I have seen in my heart, The Lord doth not hear.

Proverbs 28:9

Whoso is turning his ear from hearing the law, Even his prayer is an abomination.

Isaiah 1:15

And in your spreading forth your hands, I hide mine eyes from you, Also when ye increase prayer, I do not hear, Your hands of blood have been full.

John 9:31

and we have known that God doth not hear sinners, but, if any one may be a worshipper of God, and may do His will, him He doth hear;

James 4:3

ye ask, and ye receive not, because evilly ye ask, that in your pleasures ye may spend it.

Job 27:8-9

For what is the hope of the profane, When He doth cut off? When God doth cast off his soul?

Job 36:21

Take heed -- do not turn unto iniquity, For on this thou hast fixed Rather than on affliction.

Proverbs 15:8

The sacrifice of the wicked is an abomination to Jehovah, And the prayer of the upright is His delight.

Proverbs 15:29

Far is Jehovah from the wicked, And the prayer of the righteous He heareth.

Proverbs 21:13

Whoso is shutting his ear from the cry of the poor, He also doth cry, and is not answered.

Treasury of Scripture Knowledge

Summary

If I regard iniquity in my heart, the Lord will not hear me:

Bible References

If i regard

Job 27:8
For what is the hope of the profane, When He doth cut off? When God doth cast off his soul?
Proverbs 15:8
The sacrifice of the wicked is an abomination to Jehovah, And the prayer of the upright is His delight.
Proverbs 21:13
Whoso is shutting his ear from the cry of the poor, He also doth cry, and is not answered.
Proverbs 28:9
Whoso is turning his ear from hearing the law, Even his prayer is an abomination.
Isaiah 1:15
And in your spreading forth your hands, I hide mine eyes from you, Also when ye increase prayer, I do not hear, Your hands of blood have been full.
John 9:31
and we have known that God doth not hear sinners, but, if any one may be a worshipper of God, and may do His will, him He doth hear;
James 4:3
ye ask, and ye receive not, because evilly ye ask, that in your pleasures ye may spend it.