I am referring to text from "stories of the prophets" (ibn kathir, English version, darussalam print).
Qaroon said Allah preffered you(moses) for prophethood over me. And Allah preffered me over you in wealth. Let me invoke divine curse upon you. And then you invoke upon me.
Both reach a place, moses asked will you invoke Allah first or me. Qaroon said he will go first. Nothing happens. Then moses invokes curse. Earth swallows qaroon.
And We caused the earth to swallow him and his home. And there was for him no company to aid him other than Allah, nor was he of those who [could] defend themselves. ( Quran 28:81 )
My Question is does this mutual challenge qualify as mubahala?