First-born, Sanctification of the
Easton’s Bible Dictionary (1897)
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 (Ex. 19:22, 24), representing the family to which he belonged, and the other to be offered up in sacrifice (Gen. 4:4).
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