Commentaries:
Jamieson, Fausset, and Brown
All the firstling males of thy herd and of thy flock thou shalt sanctify unto the Lord thy God—[See on Exodus 13:2]; see Exodus 22:30).
thou shalt do not work with the firstling of thy bullock—that is, the second firstlings (see Deuteronomy 12:17-18; Deuteronomy 14:23).
Other Jamieson, Fausset, and Brown entries containing Deuteronomy 15:19:
Deuteronomy 15:12
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