Sabeans الصابئة are also called Mandaeans. They have baptism as one of their religious ceremonies. They have a book called Ginza Rabba. They say that they believe in Adam, Seth, Noah, Shem and John as their final prophet.
'The Mandaean Sabaens are considered from Ahlul-Kitab according to many of our scholars.
Hurrani Sadeans worship stars that is why they not from Ahlul Kitab.
Wassalam.