In the book answering to some doubts, it has been written that: “In the book “the Persian Bayan” chapter 15 out of the 9th unit, it is said:
"فرض لکل احد ان یتتاهل لیبقی عنها من نفس یوجدالله بها –وان یظهر من احدهما ما یمتعهما عن ذلک حل علی کل واحد باذن دونه لان یظهر عنه الثمره"
“Getting married is necessary and having sexual intercourse is its legitimate term. In the book Bayan the word اقتران [having sexual intercourse] is the equivalent of getting married in Islam… That is, they must divorce legitimately and get married again with the other one. Additionally it has been explained in the Persian part of this part –it is ordered in the Bayan that it is allowable that he/she can have sexual intercourse with a permit if there is a means of prevention in one side…[1]”
In the Arabic part of Bab’s statement, it has been said:
"حل علی کل واحد باذن دونه لان یظهر عنه الثمره"
It is legitimate for each one of them to have a baby with the allowable of the other.
This statement clarifies: What is legitimate and permissible is having a baby and there isn’t any condition for how it will be created, and it is figured out to have a baby, anyway.
In the Persian part the word اقتران [having sexual intercourse] has been mentioned which have been used by Seyyed Bab in all Bab’s writings having this meaning; but the author has claimed for the meaning of getting married for the word “اقتران”. It is really irrelevant and there isn’t any proof for it. If you investigate the book Bayan from the beginning to chapter 25, unit 8; you will figure out that this word has been applied nearly 50 times and in all instances, Seyyed Bab meant having sexual intercourse; such as: The book Bayan, chapter 16, unit 3; chapter 3, unit 4; chapter 8, unit 4; chapter 10, unit4; chapter 1, unit 6; chapter 7, unit 6.
It is understood from the book “answering to several doubts” that the author has been just going to defend Ali Muhammad Bab and other Baha’i leaders.