Lamb on Zion and new song

1Then I looked, and behold, the Lamb was standing on Mount Zion, and with him were one hundred forty-four thousand who had his name and his Father's name written on their foreheads.

2And I heard a sound from heaven like the sound of many waters and like the sound of loud thunder, and the sound that I heard was like harpists playing on their harps.

3And they are singing what seemed to be a new song before the throne and before the four living creatures and the elders. And no one was able to learn the song except the one hundred forty-four thousand, those who had been purchased from the earth.