John 3:33
Any man who has received His testimony has solemnly declared that God is true.
John 6:27
Bestow your pains not on the food which perishes, but on the food that remains unto the Life of the Ages--that food which will be the Son of Man's gift to you; for on Him the Father, God, has set His seal."
Romans 3:3-4
For what if some Jews have proved unfaithful? Shall their faithlessness render God's faithfulness worthless?
Romans 4:18-21
Under utterly hopeless circumstances he hopefully believed, so that he might become the forefather of many nations, in agreement with the words "Equally numerous shall your posterity be."
2 Corinthians 1:18
As certainly as God is faithful, our language to you is not now "Yes" and now "No."
2 Corinthians 1:22
and He has also set His seal upon us, and has put His Spirit into our hearts as a pledge and foretaste of future blessing.
Ephesians 1:13
And in Him you Gentiles also, after listening to the Message of the truth, the Good News of your salvation--having believed in Him--were sealed with the promised Holy Spirit;
Titus 1:1-2
Paul, a bondservant of God and an Apostle of Jesus Christ for building up the faith of God's own people and spreading a full knowledge of the truths of religion,
Hebrews 6:17
In the same way, since it was God's desire to display more convincingly to the heirs of the promise how unchangeable His purpose was,
1 John 5:9-10
If we accept the testimony of men, God's testimony is greater: for God's testimony consists of the things which He has testified about His Son.
Revelation 7:3-8
"Injure neither land nor sea nor trees," he said, "until we have sealed the bondservants of our God upon their foreheads."