The following is the results of your search for first-born, sanctification of the.
First-born, Sanctification of the: A peculiar sanctity was attached to the first-born both of man and of
cattle. God claimed that the first-born males of man and of animals
should be consecrated to him, the one as a priest representing the
family to which he belonged, and the other to be offered up in
sacrifice
(Genesis 4:4)