'Seal' in the Bible

When the lamb opened the second seal, I heard the second living creature say, "Go!"

When the lamb opened the third seal, I heard the third living creature say, "Go!" I looked, and there was a black horse! Its rider held a scale in his hand.

When the lamb opened the fourth seal, I heard the voice of the fourth living creature say, "Go!"

When the lamb opened the fifth seal, I saw under the altar the souls of those who had been slaughtered because of the word of God and the testimony they had given.

Then I saw the lamb open the sixth seal. There was a powerful earthquake. The sun turned as black as sackcloth made of hair, and the full moon turned as red as blood.

I saw another angel coming from the east having the seal of the living God. He cried out in a loud voice to the four angels who had been permitted to harm the land and sea,

"Don't harm the land, the sea, or the trees until we have marked the servants of our God with a seal on their foreheads."

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

They were told not to harm the grass on the earth, any green plant, or any tree. They could harm only the people who do not have the seal of God on their foreheads.

When the seven thunders spoke, I was going to write, but I heard a voice from heaven say, "Seal up what the seven thunders have said, and don't write it down."

Then he told me, "Don't seal up the words of the prophecy in this book, because the time is near.