'Forty four' in the Bible

Now I heard the number of those who were marked with the seal, one hundred and forty-four thousand, sealed from all the tribes of the people of Israel:

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

and they were singing a new song before the throne and before the four living creatures and the elders. No one was able to learn the song except the one hundred and forty-four thousand who had been redeemed from the earth.

He also measured its wall, one hundred forty-four cubits according to human measurement, which is also the angel's.