(19) All the firstling males. . . . thou shalt sanctify--i.e., recognise them as the property of Jehovah by not using them for ordinary purposes. In Leviticus 27:26 we read, "No man shall sanctify it"--i.e., shall make it the subject of a special vow or dedication, because it already belongs to Jehovah. This is the only interpretation consistent with the context in Leviticus; for Deuteronomy 27 deals entirely with "voluntary" offerings, which are in a sense outside the Law. (See Notes at the commencement of Deuteronomy 28, 29).

Verses 19-23. - In Deuteronomy 12:6, 17 and in Deuteronomy 14:23, reference is made to sacrificial meals, and to the appropriation of the firstlings of the herds and flocks thereto; Moses here reverts to this, and gives a fuller exposition of it. It is enjoined that, as all the firstborn were to be sanctified to the Lord (Exodus 13:2-13), they were not to work with the firstborn of their cattle, either by yoking the bullock to the plough or wagon or by shearing the sheep: these belonged to God, and were not to be put to any vulgar uses of men; year by year they were to be brought to the sanctuary, offered as sacrifices, and eaten before the Lord. If any of the firstborn animals were blind, or lame, or in any way blemished, such was not to be offered to the Lord, but might be used as food in their ordinary places of residence (cf. Leviticus 22:19, etc.).

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.All the firstling males that come of thy herd, or of thy flock, thou shalt sanctify unto the Lord thy God,.... According to the law in Exodus 13:2. See Gill on Exodus 13:2; See Gill on Exodus 13:12; See Gill on Exodus 13:13,

thou shalt do no work with the firstling of thy bullock: as to plough or tread out the corn with it, which were done with other heifers:

nor shear the firstling of thy sheep; nor was the wool shorn of it to be made use of; one of the Jewish canons runs thus,"if any man weave an hand's breadth of the wool of a firstling into cloth, the cloth is to be burnt (l).''

(l) Misn. Orlah, c. 3. sect. 3.