Korah was a man of the tribe of Levi, who together with Dathan and Abiram, led an insurrection against Moses and Aaron. Apparently their insurrection was prompted by their being out in the wilderness with no place to go. This happened after the Children of Israel had approached the land of Canaan from the south and had sent out spies to scout the land. Ten of the twelve spies said the land was too strong for them, that there were giants there. Moses then told the whole congregation they would all have to spend forty years in the wilderness until all that generation had died. In this story, Moses and Aaron represent the Lord. When Korah and his fellow rebels murmured against them and took fire from the altar and burned incense with it, they represented the profanation of mixing what is good (the fire from the altar) with what is evil (rebelling against Moses). The three rebel leaders and their followers were separated from the congregation and were swallowed up by a pit that opened in the earth. In our lives, evils need to be separated, too, and gotten rid of.

(Odkazy: The Apocalypse Explained 324 [6])

3577. 'Like the odour of the field' means as the good ground from which truth is acquired. This is clear from the meaning of 'the odour of the field' as the perception of truth acquired from good, like the scent from the harvest in the field - 'the field' meaning good ground, see 3500. The reason 'odour' means perception is that all the delight that good yields and all the pleasantness that truth gives, which people perceive in the next life, also manifest themselves there as corresponding odours, see 1514, 1517-1519. From this and from correspondences it is evident that 'odour' is nothing else than the power of perception, though a natural power of perception corresponding to a spiritual power of it.