most terrible of all punishments

... most terrible of all punishments described by the Master in His Will when He wrote:

‘Should any, within or without the company of the Hands of the Cause of God disobey and seek division, the wrath of God and His vengeance will be upon him, for he will have caused a breach in the true Faith of God.’

(“Guard Ye the Cause of God” A Message from the Hands of the Faith Residing in the Holy Land)

https://bahai.works/Bahá’í_News/Issue_353/Text