Firstborn: The firstborn of clean animals shall be offered upon the
altar.
Primary Verses:
Num. 18:17
"But the firstling of a cow, or
the firstling of a sheep, or the firstling of a goat,
thou shalt not redeem;
they are holy: thou shalt sprinkle their blood upon the
altar, and shalt burn their fat for an offering made by
fire, for a sweet savour unto the LORD."
