All the firstling males thou shalt sanctify — Giving them to God on the eighth day. And thou shalt do no work with the female firstlings of the cow, nor shear those of the sheep. Even these must be offered to God as peace — offerings, or used in a religious feast.
Related Commentaries of Deuteronomy 15:19
Deuteronomy 15:19
19 All the firstling males that come of thy herd and of thy flock thou shalt sanctify unto the LORD thy God: thou shalt do no work with the firstling of thy bullock, nor shear the firstling of thy sheep.