Hereunbefore or Hereinbefore: How To spell?

The word Hereunbefore is misspelled against Hereinbefore, an adverb meaning "In the preceding part of this (writing, document, book, etc.)."

Word contains consecutive vowels 'EI' in between alphabets her & nbefore is misspelled as 'EU'
Wrong Spelling:  her-eu-nbefore 
Correct Spelling:  her-ei-nbefore 
Check more misspelled words of Hereinbefore to spell it correct.