15:19-23 Here is a direction what to do with the firstlings. We are not now limited as the Israelites were; we make no difference between a first calf, or lamb, and the rest. Let us then look to the gospel meaning of this law, devoting ourselves and the first of our time and strength to God; and using all our comforts and enjoyments to his praise, and under the direction of his law, as we have them all by his gift.

19. All the firstling males of thy herd and of thy flock thou shalt sanctify unto the Lord thy God—[See on [143]Ex 13:2]; see Ex 22:30).

thou shalt do not work with the firstling of thy bullock—that is, the second firstlings (see De 12:17, 18; 14:23).