Ephesians 1:13
In whom ye also trusted, when ye heard the word of truth, the gospel of your salvation: in whom also when ye believed, ye were sealed with the holy Spirit of promise,
Ephesians 4:30
And grieve not the holy Spirit of God whereby ye are sealed to the day of redemption.
2 Timothy 2:19
However, the foundation of God standeth firm, having this inscription, The Lord knoweth them that are his; and, Let every one that nameth the name of Christ depart from iniquity.
Revelation 7:2
And I saw another angel which ascended from the east, having the seal of the living God: and he cried with a loud voice to the four angels, to whom it was given to hurt the earth and the sea,