Psalm 73:13

Surely I have made my heart pure in vain, and washed my hands in innocence.

Job 34:9

For he has said, It profits a man nothing when he is accepted with God.

Psalm 26:6

I will wash my hands in innocency; so I will go around Your altar, O Jehovah,

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

For you say, What will it benefit you? And, What good shall I have more than if I had sinned?

Job 9:27

If I say, I will forget my complaint, I will depart from my heaviness and be of good cheer,

Job 9:31

yet You will plunge me into the ditch and my own clothes shall despise me.

Psalm 24:4

He who has clean hands and a pure heart; who has not lifted up his soul to vanity, 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

You have said, It is vain to serve God; and, What profit is it that we have kept His charge, and that we have walked as mourners before Jehovah of Hosts?

Hebrews 10:19-22

Therefore, brothers, having boldness to enter into the Holy of Holies by the blood of Jesus,

James 4:8

Draw near to God, and He will draw near to you. Cleanse your hands, sinners; and purify your hearts, double-minded ones.

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 depart from my heaviness 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 he has said, It profits a man nothing when he is accepted with God.
Job 35:3
For you say, What will it benefit you? And, What good shall I have more than if I had sinned?
Malachi 3:14
You have said, It is vain to serve God; and, What profit is it that we have kept His charge, and that we have walked as mourners before Jehovah of Hosts?

Washed

Psalm 24:4
He who has clean hands and a pure heart; who has not lifted up his soul to vanity, and has not sworn deceitfully.
Psalm 26:6
I will wash my hands in innocency; so I will go around Your altar, O Jehovah,
Psalm 51:10
Create in me a clean heart, O God, and renew a right spirit within me.
Hebrews 10:19
Therefore, brothers, having boldness to enter into the Holy of Holies by the blood of Jesus,
James 4:8
Draw near to God, and He will draw near to you. Cleanse your hands, sinners; and purify your hearts, double-minded ones.

General references

Job 9:29
I have been condemned; why then should I labor in vain?
Job 34:8
who goes in company with the workers of iniquity, and walks with wicked men?
Psalm 94:19
In the multitude of my thoughts within me Your comforts delight my soul.
1 Corinthians 15:14
And if Christ has not been raised, then our proclamation is worthless, and your faith is also worthless.