Ephesians 1:13; Ephesians 4:30

13 Furthermore, you who heard the message of the truth, the Good News offering you deliverance, and put your trust in the Messiah were sealed by him with the promised Ruach HaKodesh,
30 Don't cause grief to God's Ruach HaKodesh, for he has stamped you as his property until the day of final redemption.