Pharaoh will not listen to you, but I will put my hand into Egypt and bring the military divisions of my people the Israelites out of the land of Egypt by great acts of judgement.
From the Israelites, I have given the Levites exclusively to Aaron and his sons to perform the work for the Israelites at the tent of meeting and to make atonement on their behalf, so that no plague will come against the Israelites when they approach the sanctuary.’
Moses, Aaron, and the entire Israelite community did this to the Levites. The Israelites did everything to them the Lord commanded Moses regarding the Levites.
After that, the Levites came to do their work at the tent of meeting in the presence of Aaron and his sons. So they did to them as the Lord had commanded Moses concerning the Levites.
and they observed it in the first month on the fourteenth day at twilight in the Wilderness of Sinai. The Israelites did everything as the Lord had commanded Moses.