Luke 16:15

And He said to them, "Ye are those who justify yourselves before men; but God knoweth your hearts; because that which is exalted among men is an abomination before God.

John 7:24

Judge not according to appearance, but judge righteous judgment."

Acts 1:24

And, praying, they said, "Thou, Lord, Who knowest the hearts of all men, show which of these two Thou didst choose,

1 Peter 2:4

to Whom coming, a Living Stone, rejected, indeed, by men, but with God Elect, Precious,

1 Peter 3:4

but let it be the hidden man of the heart, in the incorruptible apparel of a meek and quiet spirit, which in the sight of God is of great price.

2 Corinthians 10:7

Ye look at things according to appearance. If anyone has trusted to himself that he is Christ's, let him consider this again with himself, that, as he is Christ's, so also are we.

2 Corinthians 10:10

because, "His letters, indeed," says one, "are weighty and strong, but his bodily presence is weak, and his speech contemptible."

Hebrews 4:13

And there is no creature that is not manifest in His presence; but all things are naked and laid bare to the eyes of Him with Whom is our account.

Revelation 2:23

And her children I will slay with death; and all the assemblies shall know that I am He Who searcheth the reins and hearts; and I will give to you, each one, according to your works.

Treasury of Scripture Knowledge

Summary

But the LORD said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for the LORD seeth not as man seeth; for man looketh on the outward appearance, but the LORD looketh on the heart.

Bible References

Seeth not

Luke 16:15
And He said to them, "Ye are those who justify yourselves before men; but God knoweth your hearts; because that which is exalted among men is an abomination before God.
1 Peter 2:4
to Whom coming, a Living Stone, rejected, indeed, by men, but with God Elect, Precious,
1 Peter 3:4
but let it be the hidden man of the heart, in the incorruptible apparel of a meek and quiet spirit, which in the sight of God is of great price.

Looketh

John 7:24
Judge not according to appearance, but judge righteous judgment."
2 Corinthians 10:7
Ye look at things according to appearance. If anyone has trusted to himself that he is Christ's, let him consider this again with himself, that, as he is Christ's, so also are we.

On the heart

Acts 1:24
And, praying, they said, "Thou, Lord, Who knowest the hearts of all men, show which of these two Thou didst choose,
Hebrews 4:13
And there is no creature that is not manifest in His presence; but all things are naked and laid bare to the eyes of Him with Whom is our account.
Revelation 2:23
And her children I will slay with death; and all the assemblies shall know that I am He Who searcheth the reins and hearts; and I will give to you, each one, according to your works.