Ezekiel 9:4

2 Corinthians 1:22 NIV
set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come.

2 Timothy 2:19 NIV
Nevertheless, God’s solid foundation stands firm, sealed with this inscription: “The Lord knows those who are his,” and, “Everyone who confesses the name of the Lord must turn away from wickedness.”

Jeremiah 13:17 NIV
If you do not listen, I will weep in secret because of your pride; my eyes will weep bitterly, overflowing with tears, because the Lord’s flock will be taken captive.

Revelation 14:1 NIV
Then I looked, and there before me was the Lamb, standing on Mount Zion, and with him 144,000 who had his name and his Father’s name written on their foreheads.

Revelation 20:4 NIV
I saw thrones on which were seated those who had been given authority to judge. And I saw the souls of those who had been beheaded because of their testimony about Jesus and because of the word of God. They had not worshiped the beast or its image and had not received its mark on their foreheads or their hands. They came to life and reigned with Christ a thousand years.

Revelation 7:2-3 NIV
Then I saw another angel coming up from the east, having the seal of the living God. He called out in a loud voice to the four angels who had been given power to harm the land and the sea: “Do not harm the land or the sea or the trees until we put a seal on the foreheads of the servants of our God.”

Revelation 9:4 NIV
They were told not to harm the grass of the earth or any plant or tree, but only those people who did not have the seal of God on their foreheads.