The Báb makes Muhammad Sháh aware of the eventual triumph of the Cause of God

“I swear by God! I seek no earthly goods from thee, be it as much as a mustard seed.... I swear by the truth of God! Wert thou to know that which I know, thou wouldst forego the sovereignty of this world and of the next, that thou mightest attain My good pleasure, through thine obedience unto the True One.... Wert thou to refuse, the Lord of the world would raise up one who will exalt His Cause, and the Command of God will, verily, be carried into effect.” 

- The Báb  (Quoted by Shoghi Effendi in ‘The Promised Day Is Come’)

The Báb admonishes Muhammad Sháh for the way he had treated Him

“I swear by the truth of God! Were he who hath been willing to treat Me in such a manner to know who it is whom he hath so treated, he, verily, would never in his life be happy. Nay—I, verily, acquaint thee with the truth of the matter—it is as if he hath imprisoned all the Prophets, and all the men of truth, and all the chosen ones.... Woe betide him from whose hands floweth evil, and blessed the man from whose hands floweth good....” 

- The Báb  (Quoted by Shoghi Effendi in ‘The Promised Day Is Come’)

The Báb confirms with Muhammad Sháh that He did send him “a messenger and a book” in 1844

“By My life! But for the obligation to acknowledge the Cause of Him Who is the Testimony of God ... I would not have announced this unto thee.... In that same year [year 60] I despatched a messenger and a book unto thee, that thou mightest act towards the Cause of Him Who is the Testimony of God as befitteth the station of thy sovereignty....” 

- The Báb  (Quoted by Shoghi Effendi in ‘The Promised Day Is Come’)