Ephesians 1:13

In him, you also have heard the word of truth, the gospel of your salvation. Having also believed, you were sealed in him with the promised Holy Spirit,

Ephesians 4:30

And do not grieve the Holy Spirit of God, in whom you were sealed for the day of redemption.

2 Timothy 2:19

Nevertheless, God's firm foundation stands, having this seal: "The Lord knows those who are his," and, "Everyone who names the name of the Lord must turn away from wickedness."

Revelation 7:2

Then I saw another angel ascend from the rising of the sun, having the seal of the living God, and he called out with a loud voice to the four angels who had been given power to harm the earth and sea,

Treasury of Scripture Knowledge

Summary

With the work of an engraver in stone, like the engravings of a signet, shalt thou engrave the two stones with the names of the children of Israel: thou shalt make them to be set in ouches of gold.

Bible References

Engravings of a signet

Ephesians 1:13
In him, you also have heard the word of truth, the gospel of your salvation. Having also believed, you were sealed in him with the promised Holy Spirit,
Ephesians 4:30
And do not grieve the Holy Spirit of God, in whom you were sealed for the day of redemption.
2 Timothy 2:19
Nevertheless, God's firm foundation stands, having this seal: "The Lord knows those who are his," and, "Everyone who names the name of the Lord must turn away from wickedness."
Revelation 7:2
Then I saw another angel ascend from the rising of the sun, having the seal of the living God, and he called out with a loud voice to the four angels who had been given power to harm the earth and sea,