2 Corinthians 1:22

And it is he who has put his stamp on us, even the Spirit, as the sign in our hearts of the coming glory.

2 Corinthians 5:5

Now he who has made us for this very thing is God, who has given us the Spirit as a witness of what is to come.

Ephesians 1:13-14

In whom you, having been given the true word, the good news of your salvation, and through your faith in him, were given the sign of the Holy Spirit of hope,

Ephesians 4:30

And do not give grief to the Holy Spirit of God, by whom you were marked for the day of salvation.

John 6:27

Let your work not be for the food which comes to an end, but for the food which goes on for eternal life, which the Son of man will give to you, for on him has God the Father put his mark.

Romans 4:11

And he was given the sign of circumcision as a witness of the faith which he had before he underwent circumcision: so that he might be the father of all those who have faith, though they have not circumcision, and so that righteousness might be put to their account;

Romans 8:9

You are not in the flesh but in the Spirit, if the Spirit of God is in you. But if any man has not the Spirit of Christ he is not one of his.

Romans 8:14-16

And all those who are guided by the Spirit of God are sons of God.

Romans 8:23

And not only so, but we who have the first fruits of the Spirit, even we have sorrow in our minds, waiting for the time when we will take our place as sons, that is, the salvation of our bodies.

2 Timothy 2:19

But God's strong base is unchanging, having this sign, The Lord has knowledge of those who are his: and, Let everyone by whom the name of the Lord is named be turned away from evil.

Revelation 2:17

He who has ears, let him give ear to what the Spirit says to the churches. To him who overcomes I will give of the secret manna, and I will give him a white stone, and on the stone a new name, of which no one has knowledge but he to whom it is given.

Revelation 7:3

Do no damage to the earth, or the sea, or the trees, till we have put a mark on the servants of our God.

Revelation 9:4

And they were ordered to do no damage to the grass of the earth, or any green thing, or any tree, but only to such men as have not the mark of God on their brows.

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

The earnest

2 Corinthians 5:5
Now he who has made us for this very thing is God, who has given us the Spirit as a witness of what is to come.
Romans 8:9
You are not in the flesh but in the Spirit, if the Spirit of God is in you. But if any man has not the Spirit of Christ he is not one of his.
Ephesians 1:14
Which is the first-fruit of our heritage, till God gets back that which is his, to the praise of his glory.

General references

Exodus 30:26
This oil is to be put on the Tent of meeting, and on the ark of the law,

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain