'Forty four' in the Bible

Then I heard the number of those who were sealed. [It was] one hundred forty-four thousand [in all] from every tribe of the Israelites [Note: This could refer to Christians of Jewish descent].

And I looked, and there in front of me was the Lamb, standing on Mount Zion, and with him were one hundred and forty-four thousand persons, with the Lamb's name and His Father's name written on their foreheads.

And they [i.e., the 144,000] were singing a new song in front of God's throne, and in front of the four living beings and the [twenty-four] elders. No one could learn [to sing] this song except the one hundred and forty-four thousand [See 7:4,9] who had been purchased from the earth.