John 3:33

He that received His testimony did set his seal to it, that God is true.

John 6:27

Work not for the food that perishes, but for the food that abides unto eternal life, which the Son of Man will give to you; for Him God the Father sealed."

Romans 3:3-4

For what, if some did disbelieve? Shall their disbelief make void the faithfulness of God?

Romans 4:18-21

who, past hope, believed against hope, to the end that he might become the father of many nations, according to that which had been spoken, "So shall your seed be."

2 Corinthians 1:18

But, as God is faithful, our word to you is not "Yea" and "Nay."

2 Corinthians 1:22

Who also sealed us, and gave us the earnest of the Spirit in our hearts.

Ephesians 1:13

in Whom ye also??fter having heard the word of the truth, the Gospel of your salvation, in Whom having also believed??ere sealed with the Holy Spirit of promise,

Titus 1:1-2

Paul, a slave of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the full knowledge of the truth which is according to godliness,

Hebrews 6:17

wherein God, more abundantly willing to show to the heirs of the promise the immutability of His counsel, interposed with an oath;

1 John 5:9-10

If we receive the testimony of men, the testimony of God is greater; because this is the testimony of God, that He hath testified concerning His Son.

Revelation 7:3-8

saying, "Hurt not the earth, nor the sea, nor the trees, until we shall seal the servants of our God on their foreheads."

Treasury of Scripture Knowledge

Summary

He that hath received his testimony hath set to his seal that God is true.

Bible References

Hath set

Romans 3:3
For what, if some did disbelieve? Shall their disbelief make void the faithfulness of God?
Romans 4:18
who, past hope, believed against hope, to the end that he might become the father of many nations, according to that which had been spoken, "So shall your seed be."
2 Corinthians 1:18
But, as God is faithful, our word to you is not "Yea" and "Nay."
Titus 1:1
Paul, a slave of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the full knowledge of the truth which is according to godliness,
Hebrews 6:17
wherein God, more abundantly willing to show to the heirs of the promise the immutability of His counsel, interposed with an oath;
1 John 5:9
If we receive the testimony of men, the testimony of God is greater; because this is the testimony of God, that He hath testified concerning His Son.