'Firstborn Males' in the Bible

And all the firstborn males according to the number of names, from a month old and upward, of those that were numbered of them, were twenty and two thousand two hundred and threescore and thirteen.

All the firstborn males that come of your herd and of your flock you shall sanctify unto the LORD your God: you shall do no work with the firstborn of your bullock, nor shear the firstborn of your sheep.