'Forty four' in the Bible

And I heard the number of those who were sealed, one hundred and forty-four thousand sealed from every tribe of the sons of Israel:

Then I looked, and behold, the Lamb was standing on Mount Zion, and with Him one hundred and forty-four thousand, having His name and the name of His Father written on their foreheads.

And they *sang a new song before the throne and before the four living creatures and the elders; and no one could learn the song except the one hundred and forty-four thousand who had been purchased from the earth.