John 3:33
Whoever does accept it, certifies to the truth of God.
John 6:27
Work for no perishing food, but for that lasting food which means eternal life; the Son of man will give you that, for the Father, God, has certified him."
Romans 3:3-4
Even supposing some of them have proved untrustworthy, is their faithlessness to cancel the faithfulness of God?
Romans 4:18-21
For Abraham, when hope was gone, hoped on in faith, and thus became the father of many nations ??even as he was told, So numberless shall your offspring be.
2 Corinthians 1:18
By the good faith of God, my word to you was not 'yes and no';
2 Corinthians 1:22
who stamped me with his seal and gave me the Spirit as a pledge in my heart.
Ephesians 1:13
You also have heard the message of the truth, the gospel of your salvation, and in him you also by your faith have been stamped with the seal of the long-promised holy Spirit
Titus 1:1-2
Paul a servant of God and an apostle of Jesus Christ for the faith of God's elect and for their knowledge of the Truth that goes with a religious life,
Hebrews 6:17
God, in his desire to afford the heirs of the Promise a special proof of the solid character of his purpose, interposed with an oath;
1 John 5:9-10
If we accept human testimony, God's testimony is greater; for God's testimony consists in his testimony to his Son.
Revelation 7:3-8
"Do no harm to earth or sea or trees, until we seal the servants of our God upon their foreheads."