Sha'irullah
رسول الآلهة
The texts of the Mandaeans are preserved because the Mandaeans are still extant and most have been translated to English.
I forgot that they are called Sabians often. Thanks for reminding me. I recall this subject arising between me and some fellow Muslim pals once a while ago because the Sabians were mentioned int he Qur'an
Pop quiz: Without googling, what are the tenets of the Mandaean faith?
I recall them clearly rejecting Jesus(my kicker), the emanation of existence being spiritual or supernatural (personal belief), astrological elements about stars( I really hate astrology)
That is all I can think of on the fly. Also I got it confused, I mean't Manichaeism. That is of primary interest to me, mainly because of my fascination of al=Razi