19 "All the firstborn males that are born of your herd and flock you shall dedicate to the Lord your God. You shall do no work with the firstborn of your herd, nor shear the firstborn of your flock. 20 You shall eat it, you and your household, before the Lord your God year by year at the place that the Lord will choose. 21 But if it has any blemish, if it is lame or blind or has any serious blemish whatever, you shall not sacrifice it to the Lord your God. 22 You shall eat it within your towns. The unclean and the clean alike may eat it, as though it were a gazelle or a deer. 23 Only you shall not eat its blood; you shall pour it out on the ground like water.
Matthew Henry's Commentary on Deuteronomy 15:19-23
Commentary on Deuteronomy 15:19-23
(Read Deuteronomy 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.