'Seal' in the Bible

He who has received his witness has set his seal to this, that God is true.

He received the sign of circumcision, a seal of the righteousness of the faith which he had while he was in uncircumcision, that he might be the father of all those who believe, though they might be in uncircumcision, that righteousness might also be accounted to them.

If to others I am not an apostle, yet at least I am to you; for you are the seal of my apostleship in the Lord.

However God's firm foundation stands, having this seal, "The Lord knows those who are his," and, "Let every one who names the name of the Lord depart from unrighteousness."

When he opened the second seal, I heard the second living creature saying, "Come!"

When he opened the third seal, I heard the third living creature saying, "Come and see!" And behold, a black horse, and he who sat on it had a balance in his hand.

When he opened the fourth seal, I heard the fourth living creature saying, "Come and see!"

When he opened the fifth seal, I saw underneath the altar the souls of those who had been killed for the Word of God, and for the testimony of the Lamb which they had.

I saw when he opened the sixth seal, and there was a great earthquake. The sun became black as sackcloth made of hair, and the whole moon became as blood.

I saw another angel ascend from the sunrise, having the seal of the living God. He cried with a loud voice to the four angels to whom it was given to harm the earth and the sea,

When he opened the seventh seal, there was silence in heaven for about half an hour.

They were told that they should not hurt the grass of the earth, neither any green thing, neither any tree, but only those people who don't have God's seal on their foreheads.

When the seven thunders sounded, I was about to write; but I heard a voice from the sky saying, "Seal up the things which the seven thunders said, and don't write them."

He said to me, "Don't seal up the words of the prophecy of this book, for the time is at hand.