Bamidbar - Numbers
2 And thy brethren also, the tribe of Levi, the tribe of thy father, bring thou near with thee, that they may be joined unto thee, and minister unto thee, thou and thy sons with thee being before the tent of the testimony.
7 And thou and thy sons with thee shall keep your priesthood in everything that pertaineth to the altar, and to that within the veil; and ye shall serve; I give you the priesthood as a service of gift; and the common man that draweth nigh shall be put to death.'
8 And HaShem spoke unto Aaron: 'And I, behold, I have given thee the charge of My heave-offerings; even of all the hallowed things of the children of Israel unto thee have I given them for a consecrated portion, and to thy sons, as a due for ever.
9 This shall be thine of the most holy things, reserved from the fire: every offering of theirs, even every meal-offering of theirs, and every sin-offering of theirs, and every guilt-offering of theirs, which they may render unto Me, shall be most holy for thee and for thy sons.
11 And this is thine: the heave-offering of their gift, even all the wave-offerings of the children of Israel; I have given them unto thee, and to thy sons and to thy daughters with thee, as a due for ever; every one that is clean in thy house may eat thereof.
15 Every thing that openeth the womb, of all flesh which they offer unto HaShem, both of man and beast, shall be thine; howbeit the first-born of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem.
17 But the firstling of an ox, or the firstling of a sheep, or the firstling of a goat, thou shalt not redeem; they are holy: thou shalt dash their blood against the altar, and shalt make their fat smoke for an offering made by fire, for a sweet savour unto HaShem.
19 All the heave-offerings of the holy things, which the children of Israel offer unto HaShem, have I given thee, and thy sons and thy daughters with thee, as a due for ever; it is an everlasting covenant of salt before HaShem unto thee and to thy seed with thee.'
23 But the Levites alone shall do the service of the tent of meeting, and they shall bear their iniquity; it shall be a statute for ever throughout your generations, and among the children of Israel they shall have no inheritance.
24 For the tithe of the children of Israel, which they set apart as a gift unto HaShem, I have given to the Levites for an inheritance; therefore I have said unto them: Among the children of Israel they shall have no inheritance.'
26 'Moreover thou shalt speak unto the Levites, and say unto them: When ye take of the children of Israel the tithe which I have given you from them for your inheritance, then ye shall set apart of it a gift for HaShem, even a tithe of the tithe.
28 Thus ye also shall set apart a gift unto HaShem of all your tithes, which ye receive of the children of Israel; and thereof ye shall give the gift which is set apart unto HaShem to Aaron the priest.
30 Therefore thou shalt say unto them: When ye set apart the best thereof from it, then it shall be counted unto the Levites as the increase of the threshing-floor, and as the increase of the wine-press.
32 And ye shall bear no sin by reason of it, seeing that ye have set apart from it the best thereof; and ye shall not profane the holy things of the children of Israel, that ye die not.'