Numbers 3:7-10

WEB_Strongs(i)
  7 H8104 They shall keep H4931 his requirements, H4931 and the requirements H5712 of the whole congregation H6440 before H168 the Tent H5712 of Meeting, H5647 to do H5656 the service H4908 of the tabernacle.
  8 H8104 They shall keep H3627 all the furnishings H168 of the Tent H4150 of Meeting, H4931 and the obligations H1121 of the children H3478 of Israel, H5647 to do H5656 the service H4908 of the tabernacle.
  9 H5414 You shall give H3881 the Levites H175 to Aaron H1121 and to his sons. H5414 They are wholly given H1121 to him on the behalf of the children H3478 of Israel.
  10 H6485 You shall appoint H175 Aaron H1121 and his sons, H8104 and they shall keep H3550 their priesthood. H2114 The stranger H7131 who comes near H4191 shall be put to death."