TSK
Treasury of Scripture Knowledge references in WEB.
Nadab and Abihu, the sons of Aaron, each took his censer, and put fire in it, and laid incense on it, and offered strange fire before Yahweh, which he had not commanded them.
Fire came forth from Yahweh, and devoured the two hundred fifty men who offered the incense.
He struck of the men of Beth Shemesh, because they had looked into the ark of Yahweh, he struck of the people fifty thousand seventy men; and the people mourned, because Yahweh had struck the people with a great slaughter.
The children of the Levites bore the ark of God on their shoulders with the poles thereon, as Moses commanded according to the word of Yahweh.
For this cause many among you are weak and sickly, and not a few sleep.