21 But if it has any mark on it, if it is blind or has damaged legs, or if there is anything wrong with it, it may not be offered to the Lord your God.

Matthew Henry's Commentary on Deuteronomy 15:21

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.