The Revenues of the Priests. - These are summed up in Numbers 18:8 in these words, "I give thee the keeping of My heave-offerings in all holy gifts for a portion, as an eternal statute." The notion of משׁמרת, keeping, as in Exodus 12:6; Exodus 16:23, Exodus 16:32, is defined in the second parallel clause as משׁחה, a portion (see at Leviticus 7:35). The priests were to keep all the heave-offerings, as the portion which belonged to them, out of the sacrificial gifts that the children of Israel offered to the Lord. תּרוּמת, heave-offerings (see at Exodus 25:2, and Leviticus 2:9), is used here in the broadest sense, as including all the holy gifts (kodashim, see Leviticus 21:22) which the Israelites lifted off from their possessions and presented to the Lord (as in Numbers 5:9). Among these, for example, were, first of all, the most holy gifts in the meat-offerings, sin-offerings, and trespass-offerings (Numbers 18:9, Numbers 18:10; see at Leviticus 2:3). The burnt-offerings are not mentioned, because the whole of the flesh of these was burned upon the altar, and the skin alone fell to the portion of the priest (Leviticus 7:8). "From the fire," sc., of the altar. אשׁ, fire, is equivalent to אשּׁה ot , firing (see Leviticus 1:9). These gifts they were to eat, as most holy, in a most holy place, i.e., in the court of the tabernacle (see Leviticus 6:9, Leviticus 6:19; Leviticus 7:6), which is called "most holy" here, to lay a stronger emphasis upon the precept. In the second place, these gifts included also "the holy gifts;" viz., (a) (Numbers 18:11) the heave-offering of their gifts in all wave-offerings (tenuphoth), i.e., the wave-breast and heave-leg of the peace-offerings, and whatever else was waved in connection with the sacrifices (see at Leviticus 7:33): these might be eaten by both the male and female members of the priestly families, provided they were legally clean (Leviticus 22:3.); (b) (Numbers 18:12) the gifts of first-fruits: "all the fat (i.e., the best, as in Genesis 45:18) of oil, new wine, and corn," viz., ראשׁיתם, "the first of them," the בּכּוּרים, "the first-grown fruits" of the land, and that of all the fruit of the ground (Deuteronomy 26:2, Deuteronomy 26:10; Proverbs 3:9; Ezekiel 44:30), corn, wine, oil, honey, and tree-fruit (Deuteronomy 8:8, compared with Leviticus 19:23-24), which were offered, according to 2 Chronicles 31:5; Nehemiah 10:36, Nehemiah 10:38, Tob. 1:6, as first-fruits every year (see Mishnah, Bikkur, i. 3, 10, where the first-fruits are specified according to the productions mentioned in Deuteronomy 8:8; the law prescribed nothing in relation to the quantity of the different first-fruits, but left this entirely to the offerer himself); (c) (Numbers 18:14) everything placed under a ban (see at Leviticus 27:28); and (d) (Numbers 18:15-18) the first-born of man and beast. The first-born of men and of unclean beasts were redeemed according to Numbers 3:47; Exodus 13:12-13, and Leviticus 27:6, Leviticus 27:27; but such as were fit for sacrifice were actually offered, the blood being swung against the altar, and the fat portions burned upon it, whilst the whole of the flesh fell to the portion of the priests. So far as the redemption of human beings was concerned (Numbers 18:16), they were "to redeem from the monthly child," i.e., the first-born child as soon as it was a month old.

Numbers 18:17 Parallel Commentaries

the firstling

Deuteronomy 15:19-22 All the firstling males that come of your herd and of your flock you shall sanctify to the LORD your God...

thou shall

Exodus 29:16 And you shall slay the ram, and you shall take his blood, and sprinkle it round about on the altar.

Leviticus 3:2-5 And he shall lay his hand on the head of his offering, and kill it at the door of the tabernacle of the congregation...