Numbers 18:2-6

KJV_Strongs(i)
  2 H251 And thy brethren H4294 also of the tribe H3878 of Levi H7626 , the tribe H1 of thy father H7126 , bring [H8685]   H3867 thou with thee, that they may be joined [H8735]   H8334 unto thee, and minister [H8762]   H1121 unto thee: but thou and thy sons H6440 with thee shall minister before H168 the tabernacle H5715 of witness.
  3 H8104 And they shall keep [H8804]   H4931 thy charge H4931 , and the charge H168 of all the tabernacle H7126 : only they shall not come nigh [H8799]   H3627 the vessels H6944 of the sanctuary H4196 and the altar H4191 , that neither they, nor ye also, die [H8799]  .
  4 H3867 And they shall be joined [H8738]   H8104 unto thee, and keep [H8804]   H4931 the charge H168 of the tabernacle H4150 of the congregation H5656 , for all the service H168 of the tabernacle H2114 : and a stranger [H8801]   H7126 shall not come nigh [H8799]   unto you.
  5 H8104 And ye shall keep [H8804]   H4931 the charge H6944 of the sanctuary H4931 , and the charge H4196 of the altar H7110 : that there be no wrath H1121 any more upon the children H3478 of Israel.
  6 H3947 And I, behold, I have taken [H8804]   H251 your brethren H3881 the Levites H8432 from among H1121 the children H3478 of Israel H5414 : to you they are given [H8803]   H4979 as a gift H3068 for the LORD H5647 , to do [H8800]   H5656 the service H168 of the tabernacle H4150 of the congregation.