Numbers 3:40-41

Webster_Strongs(i)
  40 H3068 And the LORD H559 [H8799] said H4872 to Moses H6485 [H8798] , Number H1060 all the firstborn H2145 of the males H1121 of the children H3478 of Israel H2320 from a month H1121 old H4605 and upward H5375 [H8798] , and take H4557 the number H8034 of their names.
  41 H3947 [H8804] And thou shalt take H3881 the Levites H3068 for me (I am the LORD H1060 ) instead of all the firstborn H1121 among the children H3478 of Israel H929 ; and the cattle H3881 of the Levites H1060 instead of all the firstlings H929 among the cattle H1121 of the children H3478 of Israel.