2 Corinthians 1:22

He has placed His seal of ownership upon us by giving us the down payment of the Holy Spirit [to live] in our hearts.

2 Corinthians 5:5

Now God is the One who has prepared us for this very thing [i.e., the receiving of a new body to live in]. He has [also] given us the Holy Spirit as a down payment. [Note: This refers to the gift of the indwelling Holy Spirit as being a guarantee that we will receive the balance of our inheritance in the form of a new body].

Ephesians 1:13-14

You [Gentiles] also, who are in Christ, after having heard the message of truth, the good news about your salvation, and [after] believing in Him, were sealed [i.e., as evidence of ownership] with the promised Holy Spirit. [or, "the Holy Spirit who brings promises"].

Ephesians 4:30

And do not grieve God's Holy Spirit by whom you were sealed [i.e., given evidence of God's ownership] until the day of redemption [i.e., until you receive your new body in heaven. See 1:14].

John 6:27

Do not work for the [kind of] food that spoils, but for the kind that lasts until never ending life. The Son of man will give you this [kind of food], for God the Father has placed His seal [of approval] on Him."

Romans 4:11

He received the sign of circumcision as a seal [confirming] that he had been [considered] righteous because of the faith he had before being circumcised. Thus, he became the [spiritual] father of all people who believe [in God], even though they have not been circumcised, so that they could be considered righteous [by their faith].

Romans 8:9

But if the Spirit of God [truly] lives in your heart, you are not [being controlled] by the flesh, but by the Holy Spirit. But if any person does not have the Spirit of Christ [living in him], he does not belong to Christ.

Romans 8:14-16

For all of those who are led by the Spirit of God are the children of God.

Romans 8:23

And not just the world, but even we [Christians] ourselves, who have the firstfruits of the Holy Spirit [i.e., the first installment of our inheritance from God] also groan within us, eagerly waiting to be adopted as [God's] children, and receive back our bodies [i.e., in the resurrection].

2 Timothy 2:19

However, the solid foundation of God stands firm. [Note: This probably refers to the church. See I Tim. 3:15]. It is sealed with these words [i.e., certifying God's ownership and a commitment to Him]: "The Lord knows those who are His people," [See Num. 16:5], and "Everyone who confesses the name of the Lord should stop practicing wickedness." [See Isa. 36:13].

Revelation 2:17

"The person who has an ear should listen to what the Holy Spirit is saying to the churches. To the person who has victory [in the Christian life] I will give some of the hidden manna, and I will [also] give him a white stone with a new name written on it, which no one understands, except the one who receives it."

Revelation 7:3

saying, "Do not harm the land, or the ocean, or the trees, until we have sealed the servants of our God [with a mark] on their foreheads."

Revelation 9:4

And they were told not to harm the grass on earth, or any greenery, or any tree, but only those people who did not have God's seal on their foreheads.

Treasury of Scripture Knowledge

Summary

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

Bible References

The earnest

2 Corinthians 5:5
Now God is the One who has prepared us for this very thing [i.e., the receiving of a new body to live in]. He has [also] given us the Holy Spirit as a down payment. [Note: This refers to the gift of the indwelling Holy Spirit as being a guarantee that we will receive the balance of our inheritance in the form of a new body].
Romans 8:9
But if the Spirit of God [truly] lives in your heart, you are not [being controlled] by the flesh, but by the Holy Spirit. But if any person does not have the Spirit of Christ [living in him], he does not belong to Christ.
Ephesians 1:14
He is a down payment of our inheritance, until God's own possession [i.e., His people] receives redemption. [Note: Here "redemption" refers to receiving a new body in heaven]. May this bring about praise to God's splendor.