Numbers 8:1

2 Speak unto Aaron, and say unto him, When thou lightest the lamps, the seven lamps shall give light in front of the candlestick.

3 And Aaron did so; he lighted the lamps thereof [so as to give light] in front of the candlestick, as Jehovah commanded Moses.

4 And this was the work of the candlestick, beaten work of gold; unto the base thereof, [and] unto the flowers thereof, it was beaten work: according unto the pattern which Jehovah had showed Moses, so he made the candlestick.

5 And Jehovah spake unto Moses, saying,

6 Take the Levites from among the children of Israel, and cleanse them.

7 And thus shalt thou do unto them, to cleanse them: sprinkle the water of expiation upon them, and let them cause a razor to pass over all their flesh, and let them wash their clothes, and cleanse themselves.