Ephesians 1:13

in whom you also, having heard the word of truth, the gospel of your salvation, in whom, also having believed, you were sealed with the Holy Spirit of promise,

Ephesians 4:30

And grieve not the Holy Spirit of God, by whom you were sealed unto the day of redemption.

2 Timothy 2:19

The foundation of God stands solid indeed, having this seal, The Lord knows them that are his: and; Let every one naming the name of the Lord depart from iniquity.

Revelation 7:2

And I saw another angel coming up from the rising of the sun, having the seal of the living God: and he cried with a great voice to the four angels, to whom it was given unto them to hurt the earth and the 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 whom you also, having heard the word of truth, the gospel of your salvation, in whom, also having believed, you were sealed with the Holy Spirit of promise,
Ephesians 4:30
And grieve not the Holy Spirit of God, by whom you were sealed unto the day of redemption.
2 Timothy 2:19
The foundation of God stands solid indeed, having this seal, The Lord knows them that are his: and; Let every one naming the name of the Lord depart from iniquity.
Revelation 7:2
And I saw another angel coming up from the rising of the sun, having the seal of the living God: and he cried with a great voice to the four angels, to whom it was given unto them to hurt the earth and the sea,