Acts 1:24

And having prayed, they said, Thou, O Lord, knowing hearts of all, spew forth one of two which thou hast chosen,

1 Samuel 16:7

And Jehovah will say to Samuel, Thou shalt not look upon his aspect or upon the height of his stature; for I rejected him: for not what man will see, for man will see with the eyes, and Jehovah will see at the heart

Jeremiah 17:10

I Jehovah searching the heart, trying the reins, to give to each according to his way, according to the fruit of his doings.

Acts 15:8

And God the knower of hearts testified to them, having given them the Holy Spirit, as also us;

Acts 6:6

Whom they set before the sent: and having prayed, they put hands upon them.

Revelation 2:23

And her children will I kill in death; and all the churches shall know that I am he searching the reins and hearts: and I will give to you each according to our works.

Numbers 27:16

Will Jehovah, the God of the spirits to all flesh, appoint a man over the assembly,

1 Kings 8:39

Wilt thou hear in the heavens thy prepared dwelling, and forgive and do, and give to a man according to all his ways? for thou wilt know his heart; for thou wilt know alone the heart of all the sons of men:

1 Chronicles 28:9

And thou, O Solomon my son, know thou the God of thy father, and serve him with a whole heart and with a willing soul: for Jehovah searched all hearts, and he understands every formation of the thoughts: if thou shalt seek him he will be found to thee, and if thou wilt forsake him, he will cast thee off forever.

1 Chronicles 29:17

And I knew, my God, that thou triest the heart, and from uprightness thou wilt delight. I in the uprightness of my heart gave willingly all these: and now thy people were found here; I saw with gladness to show themselves willing to thee.

Psalm 7:9

Now shall the evil of the unjust come to an end; and thou wilt direct the just one: for the just God tried hearts and reins.

Psalm 44:21

Will not God search this out? for he knew the secrets of the heart

Proverbs 3:5-6

Trust to Jehovah with all thy heart; and thou shalt not lean to thine understanding.

Proverbs 15:11

Hades and destruction are before Jehovah: much more the hearts of the sons of man.

Jeremiah 11:20

O Jehovah of armies, judging justice and trying the reins and the heart, I shall see thy vengeance from them, for to thee I uncovered my cause.

Jeremiah 20:12

And Jehovah of armies trying the just, seeing the reins and the heart, I shall see thy vengeance of them: for to thee I uncovered my cause.

Luke 6:12-13

And it was in those days, he went out to the mount to pray, and he was passing the whole night in prayer to God.

John 2:24-25

And Jesus himself trusted not himself to them, for he knew all,

John 21:17

He says to him the third time, Simon of Jonas, lovest thou me? Peter was grieved that he said the third time, Lovest thou me? And he said to him, Lord, thou knowest all; thou knowest that I love thee. Jesus says to him, Feed my sheep.

Acts 13:2-3

And they serving the Lord, and fasting, the Holy Spirit said, Separate to me Barnabas and Saul to the work which I have called them.

Acts 14:23

And having chosen them elders in the church, having prayed with fasting, they set them before the Lord, in whom they had believed.

Romans 8:27

And he searching hearts knows what the thought of the Spirit, for according to God he supplicates for the holy ones.

Hebrews 4:13

And there is no creation invisible before him: and all things naked and exposed, neck and face to view, to the eyes of him with whom to us is the word.

Treasury of Scripture Knowledge

Summary

And they prayed, and said, Thou, Lord, which knowest the hearts of all men, shew whether of these two thou hast chosen,

Bible References

They

Acts 13:2
And they serving the Lord, and fasting, the Holy Spirit said, Separate to me Barnabas and Saul to the work which I have called them.
Proverbs 3:5
Trust to Jehovah with all thy heart; and thou shalt not lean to thine understanding.
Luke 6:12
And it was in those days, he went out to the mount to pray, and he was passing the whole night in prayer to God.

Thou, lord

Acts 15:8
And God the knower of hearts testified to them, having given them the Holy Spirit, as also us;
Numbers 27:16
Will Jehovah, the God of the spirits to all flesh, appoint a man over the assembly,
1 Samuel 16:7
And Jehovah will say to Samuel, Thou shalt not look upon his aspect or upon the height of his stature; for I rejected him: for not what man will see, for man will see with the eyes, and Jehovah will see at the heart
1 Kings 8:39
Wilt thou hear in the heavens thy prepared dwelling, and forgive and do, and give to a man according to all his ways? for thou wilt know his heart; for thou wilt know alone the heart of all the sons of men:
1 Chronicles 28:9
And thou, O Solomon my son, know thou the God of thy father, and serve him with a whole heart and with a willing soul: for Jehovah searched all hearts, and he understands every formation of the thoughts: if thou shalt seek him he will be found to thee, and if thou wilt forsake him, he will cast thee off forever.
1 Chronicles 29:17
And I knew, my God, that thou triest the heart, and from uprightness thou wilt delight. I in the uprightness of my heart gave willingly all these: and now thy people were found here; I saw with gladness to show themselves willing to thee.
Psalm 7:9
Now shall the evil of the unjust come to an end; and thou wilt direct the just one: for the just God tried hearts and reins.
Psalm 44:21
Will not God search this out? for he knew the secrets of the heart
Proverbs 15:11
Hades and destruction are before Jehovah: much more the hearts of the sons of man.
Jeremiah 11:20
O Jehovah of armies, judging justice and trying the reins and the heart, I shall see thy vengeance from them, for to thee I uncovered my cause.
Jeremiah 17:10
I Jehovah searching the heart, trying the reins, to give to each according to his way, according to the fruit of his doings.
Jeremiah 20:12
And Jehovah of armies trying the just, seeing the reins and the heart, I shall see thy vengeance of them: for to thee I uncovered my cause.
John 2:24
And Jesus himself trusted not himself to them, for he knew all,
John 21:17
He says to him the third time, Simon of Jonas, lovest thou me? Peter was grieved that he said the third time, Lovest thou me? And he said to him, Lord, thou knowest all; thou knowest that I love thee. Jesus says to him, Feed my sheep.
Hebrews 4:13
And there is no creation invisible before him: and all things naked and exposed, neck and face to view, to the eyes of him with whom to us is the word.
Revelation 2:23
And her children will I kill in death; and all the churches shall know that I am he searching the reins and hearts: and I will give to you each according to our works.