negligent.

Galatians 6:7, 8
Do not be deceived: God cannot be mocked. Whatever a man sows, he will reap in return. . . .

the Lord

Numbers 3:6-9
"Bring the tribe of Levi and present them to Aaron the priest to assist him. . . .

Numbers 8:6-14
"Take the Levites from among the Israelites and make them ceremonially clean. . . .

Numbers 18:2-6
But bring with you also your brothers from the tribe of Levi, the tribe of your father, that they may join you and assist you and your sons before the Tent of the Testimony. . . .

Deuteronomy 10:8
At that time the LORD set apart the tribe of Levi to carry the ark of the covenant of the LORD, to stand before the LORD to serve Him, and to pronounce blessings in His name, as they do to this day.

Numbers 16:35-40
And fire came forth from the LORD and consumed the 250 men who were offering the incense. . . .

Numbers 18:7
But only you and your sons shall attend to your priesthood for everything concerning the altar, and for what is inside the veil, and you are to perform that service. I am giving you the work of the priesthood as a gift, but any outsider who comes near the sanctuary must be put to death."