Numbers 4:18-22

18Cut ye not offH3772 the tribeH7626 of the familiesH4940 of the KohathitesH6956 from amongH8432 the LevitesH3881: 19But thus doH6213 unto them, that they may liveH2421, and not dieH4191, when they approachH5066 unto the mostH6944 holy thingsH6944: AaronH175 and his sonsH1121 shall go inH935, and appointH7760 them everyH376 oneH376 to his serviceH5656 and to his burdenH4853: 20But they shall not go inH935 to seeH7200 when the holy thingsH6944 are coveredH1104, lest they dieH4191.

21And YhwhH3068 spakeH1696 unto MosesH4872, sayingH559, 22TakeH5375 also the sumH7218 of the sonsH1121 of GershonH1648, throughout the housesH1004 of their fathersH1, by their familiesH4940;