“A treacherous [nifsha] brother is worse than a fortified [oz] city, and strife is like the bars of a palace” (Proverbs 18:19); this is Koraḥ, who betrayed [pasha] the Torah that is strength, as it is stated: “The Lord gives strength to His people; the Lord will bless His people with peace” (Psalms 29:11). “And strife is like the bars of a palace” – did he not know that his adversaries were as sturdy as the bar of a palace? These are Moses and Aaron. Just as the bar does not move, the same is true of Moses, as it is stated: “The middle bar inside the planks will extend from end to end” (Exodus 26:28).