Psalm 73:13

Surely in vain I have cleansed my heart, and washed my hands in innocence,

Job 34:9

For thou should not say, There shall be no visitation to a man, [whereas] visitation [is] to him from LORD.

Psalm 26:6

I will wash my hands in innocence, so I will encompass thine altar, O LORD,

Job 21:15

What is the Almighty that we should serve him? And what profit should we have, if we pray to him?

Job 35:3

That thou said, What advantage will it be to thee? [And], What profit shall I have more than if I had sinned?

Job 9:27

If I say, I will forget my complaint. I will put off my [sad] countenance, and be of good cheer,

Job 9:31

yet thou will plunge me in the ditch, and my own clothes shall abhor me.

Psalm 24:4

He who has clean hands, and a pure heart, who has not lifted up his soul to falsehood, and has not sworn deceitfully.

Psalm 51:10

Create in me a clean heart, O God, and renew a right spirit within me.

Malachi 3:14

Ye have said, It is vain to serve God, and what profit is it that we have kept his charge, and that we have walked mournfully before LORD of hosts?

Hebrews 10:19-22

Having therefore, brothers, boldness for entrance into the holy things by the blood of Jesus,

James 4:8

Approach God and he will approach you. Cleanse the hands, ye sinners, and purify the hearts, ye double-minded.

Treasury of Scripture Knowledge

Summary

Verily I have cleansed my heart in vain, and washed my hands in innocency.

Bible References

Verily

Job 9:27
If I say, I will forget my complaint. I will put off my [sad] countenance, and be of good cheer,
Job 21:15
What is the Almighty that we should serve him? And what profit should we have, if we pray to him?
Job 34:9
For thou should not say, There shall be no visitation to a man, [whereas] visitation [is] to him from LORD.
Job 35:3
That thou said, What advantage will it be to thee? [And], What profit shall I have more than if I had sinned?
Malachi 3:14
Ye have said, It is vain to serve God, and what profit is it that we have kept his charge, and that we have walked mournfully before LORD of hosts?

Washed

Psalm 24:4
He who has clean hands, and a pure heart, who has not lifted up his soul to falsehood, and has not sworn deceitfully.
Psalm 26:6
I will wash my hands in innocence, so I will encompass thine altar, O LORD,
Psalm 51:10
Create in me a clean heart, O God, and renew a right spirit within me.
Hebrews 10:19
Having therefore, brothers, boldness for entrance into the holy things by the blood of Jesus,
James 4:8
Approach God and he will approach you. Cleanse the hands, ye sinners, and purify the hearts, ye double-minded.

General references

Job 9:29
I shall be condemned. Why then do I labor in vain?
Job 34:8
saying, I have not sinned, nor committed unrighteousness, nor had fellowship with workers of iniquity to go with the profane.
Psalm 94:19
In the multitude of my thoughts within me thy comforts delight my soul.
1 Corinthians 15:14
And if Christ has not risen, then our preaching is empty, and your faith is also empty.