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."
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;
Ephesians 4:30
And beware of grieving the Holy Spirit of God, in whom you have been sealed in preparation for the day of Redemption.
Revelation 7:2
And I saw another angel coming from the east and carrying a seal belonging to the ever-living God. He called in a loud voice to the four angels whose work it was to injure the earth and the sea.
Revelation 9:4
And they were forbidden to injure the herbage of the earth, or any green thing, or any tree. They were only to injure human beings--those who have not the seal of God on their foreheads.