2 Corinthians 1:22

22 set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come.

Read 2 Corinthians 1:22 Using Other Translations

Who hath also sealed us, and given the earnest of the Spirit in our hearts.
and who has also put his seal on us and given us his Spirit in our hearts as a guarantee.
and he has identified us as his own by placing the Holy Spirit in our hearts as the first installment that guarantees everything he has promised us.