Ephesians 1:13
You too, as you have heard the message of the truth, the good news that means your salvation, and as you have trusted in Him too, have been stamped with the seal of the promised Holy Spirit,
Ephesians 4:30
You must stop offending the Holy Spirit of God by whom you have been stamped for the day of redemption.
2 Timothy 2:19
But God's foundation stands unshaken, with these inscriptions: "The Lord knows the people who belong to Him" and "Everyone who bears the name of the Lord must abstain from evil."
Revelation 7:2
Then I saw another angel coming up from the east with the seal of the living God, and he cried out to the four angels who had the power to injure the earth and the sea: