Is the believer sealed by the Holy Spirit unto the day of redemption?
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And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.
(Ephesians 4:30)
Note: The day of redemption is the resurrection of the believers' bodies at Christ's coming.
For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first: Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
(1 Thessalonians 4:16-17)