Revelation 14:1-5

Then I looked, and there before me was the Lamb standing on Mount Zion. With him were one hundred forty-four thousand people who had his name and his Father’s name written on their foreheads. And I heard a sound from heaven like the noise of flooding water and like the sound of loud thunder. The sound I heard was like people playing harps. And they sang a new song before the throne and before the four living creatures and the elders. No one could learn the new song except the one hundred forty-four thousand who had been bought from the earth. These are the ones who did not do sinful things with women, because they kept themselves pure. They follow the Lamb every place he goes. These one hundred forty-four thousand were bought from among the people of the earth as people to be offered to God and the Lamb. They were not guilty of telling lies; they are without fault.