42 months is 1260 days. In Bible prophecy a day is a year in most prophecies. So that makes 1260 years. The Beast, militant Islam ruled large parts of the known world for 1260 Muslim years. They were given that authority until the year 1260 which is the Christian year 1844 when the Bab announced His Mission.
Calendar Converter - just type in 1260 for Islamic year or 1844 and you'll see they match. The Bible even knew the 1260 was Muslim years.
Hijri Gregorian Converter by IslamiCity.org - Most Beautiful Hijri Converter on the Web - IslamiCity
The Lamb in Revelation
The Lamb in Revelation is not the same Lamb used for Jesus in the Gospels.
In the Gospels, the term 'paschal lamb' is always used but in the Book of Revelation the term for Lamb is 'arnion' signifying a similar but not identical Lamb. Which us to say the Bab was similar to Christ but not identical.
Also, please note that the Lamb in Revelation was 'slaughtered' not crucified as the Bab was not crucified so the Lamb in Revelation being 'arnion' is the Bab. Arnion Lamb is nowhere in the Bible except in Revelation and never once was used to refer to Jesus.
Here's my extensive notes with sources on the two different Lambs found in the Bible.
Lambs, Two Different Ones.
This is some research I have done about the two different Lambs that exist in the Bible. One is Jesus but the other is not the same lamb in Revelation which is of course the Bab because the Lamb in Revelation is slain not crucified whereas the Lamb in the New Testament is crucified. The original language describes one lamb as Arnion and the other as Amnos.
The Lamb in Revelation is not the same Lamb in The New Testament
Young Ram or Arnion is the diminutive of arĒn/arnos meaning male sheep . Arnion is a word specific to Revelation.
All the prior New Testament Books use amnos ( Lamb ) or pascha ( Paschal Lamb ), both versions clearly portraying Jesus.
But now, suddenly, an arnion Ram runs onto the Revelation stage. It displays horns, anger, and leadership—all typical of rams, not lambs. (Apocalyse Secrets)
Jesus's title is never Arnion Lamb
Jesus is NEVER referred to as an Arnion Lamb (Ram) ever in any Book. He is always referred to as the Amnos or Paschal Lamb.
Only Arnion Lamb is ever used in Revelation (25 times)
Noun: ἀρνίον (arnion), GK 768 (S 721), 30x. arnion refers to a “lamb” or young “sheep.”
All uses of this word except for Jn. 21:15, where Jesus refers to his followers as “lambs,” are in Revelation.
(Mounce's Complete Expository Dictionary)
arnion (ἀρνίον, 721)
It is used only by the apostle John, (a) in the plural, in the Lord’s command to Peter, John 21:15, with symbolic reference to young converts; (b) elsewhere, in the singular, in the Apocalypse, some 28 times, of Christ as the “Lamb” of God,
(Vines Complete Expository Dictionary)
Christ was crucified
Matthew 27:35 And they crucified him...
Mark 15:24. And when they had crucified him,.....
Luke 23:33. they crucified him,...
John 19:23. they had crucified Jesus,..
Crucified- Strong's Definition - g4717. σταυρόω stauroō; from 4716; to impale on the cross
Slain - Strong's definition - g4969. σφάζω sphazō; a primary verb; to butcher (especially an animal for food or in sacrifice) or (generally) to slaughter, or (specially), to maim (violently): — kill, slay, wound.
The Lamb in Revelation was not crucified but slain
Revelation 5:6
And I beheld, and, lo, in the midst of the throne ....stood a Lamb as it had been slain.....
Revelation 5:9
And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain.....
Revelation 5:12
Saying with a loud voice, Worthy is the Lamb that was slain.......
So Who is the Arnion Lamb mentioned in Revelation that was slain not crucified? It was not Christ. But a Christ or One like Christ.
Revelation speaks of a New Lord with a New Name
New
“The new things that are prophesied are : a new name, the believer’s, Rev. 2:17; a new name, the Lord’s, Rev. 3:12; a new song, Rev. 5:9; a new Heaven and a new Earth, Rev. 21:1; the new Jerusalem, Rev. 3:12; 21:2; ‘And He that sitteth on the Throne said, Behold, I make all things new,’ Rev. 21:5”*