Hebrews 4:13

Neither is there any creature that is not manifest in his sight: but all things {are} naked and opened unto the eyes of him with whom we have to do.

Jeremiah 12:3

But thou, O LORD, knowest me: thou hast seen me, and tried mine heart toward thee: pull them out like sheep for the slaughter, and prepare them for the day of slaughter. {toward...: Heb. with thee}

Jeremiah 17:9-10

The heart {is} deceitful above all {things}, and desperately wicked: who can know it?

Psalms 44:21

Shall not God search this out? for he knoweth the secrets of the heart.

Psalms 17:3

Thou hast proved mine heart; thou hast visited {me} in the night; thou hast tried me, {and} shalt find nothing; I am purposed {that} my mouth shall not transgress.

Psalms 139:23

Search me, O God, and know my heart: try me, and know my thoughts:

1 Chronicles 28:9

And thou, Solomon my son, know thou the God of thy father, and serve him with a perfect heart and with a willing mind: for the LORD searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou seek him, he will be found of thee; but if thou forsake him, he will cast thee off for ever.

Revelation 2:23

And I will kill her children with death; and all the churches shall know that I am he which searcheth the reins and hearts: and I will give unto every one of you according to your works.