Numbers 3:12
When God miraculously destroyed all the first-born of the Egyptians, (Ex 12:29,) he spared those of the Israelites; and, in commemoration of that event, he was pleased to appoint that all the first-born males "should be set apart unto himself." (Ex 13:12-16.) God is here pleased to relinquish this claim, and to appoint the whole tribe of Levi to attend his immediate service in their stead.
Numbers 18:12
best .... olive oil ..... best <03323 02459> [best of the oil. Heb. fat.]
first fruits <07225> [the first-fruits.]
Numbers 28:27
two young <08147 01241> [two young.]
Bishop Patrick observes that no peace offerings are appointed in this chapter, which were chiefly for the benefit of the offerers, and therefore in them they were left more to themselves; but burnt offerings, which were purely for the honour of God, and confessions of his dominion, and which figured evangelical piety and devotion, by which the soul is wholly offered up to God, in the flames of holy love; and sin offerings, which were typical of Christ's sacrifice of himself, by which we and our services are perfected and sanctified.