1 Chronicles 23:24-27

ASV_Strongs(i)
  24 H1121 These were the sons H3878 of Levi H1 after their fathers' H1004 houses, H7218 even the heads H1 of the fathers' H6485 houses of those of them that were counted, H4557 in the number H8034 of names H1538 by their polls, H6213 who did H4399 the work H5656 for the service H1004 of the house H3068 of Jehovah, H6242 from twenty H1121 years H1121 old H4605 and upward.
  25 H1732 For David H559 said, H3068 Jehovah, H430 the God H3478 of Israel, H5117 hath given rest H5971 unto his people; H7931 and he dwelleth H3389 in Jerusalem H5769 for ever:
  26 H3881 and also the Levites H5375 shall no more have need to carry H4908 the tabernacle H3627 and all the vessels H5656 of it for the service thereof.
  27 H314 For by the last H1697 words H1732 of David H3881 the sons of Levi H4557 were numbered, H6242 from twenty H8141 years H1121 old H4605 and upward.