Bible Verses About Seals: Appropriation of Saints to God by the Spirit

Who hath also sealed us, and given the earnest of the Spirit in our hearts.

In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,

And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.