'Forty four' in the Bible

AND I saw, and lo, a lamb stood upon the mount Zion, and with him an hundred forty-four thousand, having the name of his Father inscribed on their foreheads.

and they sang as it were a new song before the throne, and before the four living beings, and the presbyters: and no person could learn that song, but the hundred forty-four thousand, who were redeemed from the earth.

He measured also the wall of it a hundred and forty-four cubits, according to the measure of a man, for such is that of an angel.