John 3:33
He who has received his testimony has certified that God is true.
John 6:27
Do not labor for the food which perishes, but for the food which endures to eternal life, which the Son of Man will give to you; for on him has God the Father set his seal."
2 Corinthians 1:22
he has put his seal on us and given us his Spirit in our hearts as a guarantee.
Ephesians 1:13
In him, you also have heard the word of truth, the gospel of your salvation. Having also believed, you were sealed in him with the promised Holy Spirit,
Ephesians 4:30
And do not grieve the Holy Spirit of God, in whom you were sealed for the day of redemption.
Revelation 7:2
Then I saw another angel ascend from the rising of the sun, having the seal of the living God, and he called out with a loud voice to the four angels who had been given power to harm the earth and sea,
Revelation 9:4
They were told not to harm the grass of the earth or any green growth or any tree, but only those of mankind who have not the seal of God on their foreheads.