('Bayan' Wahid 6, chapter 11) "We have made the semen clean so that 'He whom Allah Shall Manifest' is not born out of impure semen"
Bahaullah was born 2 years before the Bab..thus invalidating his claim as the Manifestation..due to uncleanliness of semen.
The verse does not mean that the Promised one was not born yet.
There is this belief among Muslim scholars that Semen is Unclean. There is no basis for this in Quran. And Scientifically there is no reason to say it is Unclean. The verse is correcting this Misconception.
"We have made the semen clean", does not mean it was unclean before , but now is clean so Baha'u'llah will be born clean. "We have made the semen clean" means, from begining We have made the semen clean.
In fact The Bab alluded in His verses that the Promised One would Proclaim in the Year 19 in the Babi Calander (19 years after Proclamation of Bayan):
"
I, indeed, beg to address Him Whom God shall make manifest, by Thy leave in these words: Shouldst Thou dismiss the entire company of the followers of the Bayán in the Day of the Latter Resurrection by a mere sign of Thy finger even while still a suckling babe, Thou wouldst indeed be praised in Thy indication. And though no doubt is there about it, do Thou grant a respite of nineteen years as a token of Thy favour so that those who have embraced this Cause may be graciously rewarded by Thee." The Bab
'Bayan' Wahid 5 "The new Manifestation would come only after all have been educated with the Bayan."
How can people be educated by the Bayan..when it was never completed?
This is what the verse says:
"The object is that when He whom God shall manifest shall appear, all shall have been educated in the Bayán,
that none of the believers in the Bayán may remain outside belief in Him; should one do so, the Command concerning him is as the Command concerning him who believeth not in God. I swear by God that in the Manifestation of Him whom God shall manifest all shall unite in helping [the propagation of the Faith], not one will remain on the earth who shall not enter into Paradise."
(The Persian Bayán, Vahid V, Chapter 4, Momen, p. 364)
Here the statement can be addressing His own Followers. "All" who are His Present. This part of the verse make it clear "that none of the believers in the Bayán "
Moreover, He is not prophecising this will happen, but He is encouraging them that this should be their goal.
There was a space of 600 years between Jesus (p.b.u.h) and Hazrat Mohammed (p.b.u.h) and over 1,200 years between Hazrat Mohammed (p.b.u.h) and the Bab. The gap between The Bab and Bahaullah was just 15 years. What changed in those 15 years that required a new Manifestation and a change in religion? Why was a new Manifestation needed so soon?
Again based on Islamic Prophecies, first Mahdi comes, then Christ. The Mission of the Bab was to prepare the way for comming of Baha'u'llah, because the Persia was an Islamic Country and not accepting a New Revealtion after Islam. So, the Bab sacrificed His life, to correct this view, make them ready to accept a new Revelation, to create enough potency and momentum, so when Baha'u'llah comes the way is ready.
This has happend before too. Like the John Baptist who was a Prophet and, Jesus came right after Him.
But essencially the Bab and Baha'u'llah had the same mission. They are considered part of the same Revelation.
A dispute is reported between to early Bahai Missionaries who argued wheter Bahaullah was a Manifestation of God or God himself..they approached Bahaullah with their queries..
Bahaullah on hearing them smiled and said, "I am both as well as neither. It does not matter. Just deceive the masses with this.""-Bab-o-Baha ra Beshanaseed" page 152
"Bab-o-Baha ra Beshanaseed" must be a Book written by Anti-Baha'is. It is not a trusted Source.
It is clear such a thing could not have happend. for if Baha'u'llah has said "Just deceive the masses with this", how could even His own followers believe Him? How could His followers accepted to be killed for their belief?