Kulinism was a practice unique to the Bengali Hindu society. Hagiographical accounts & extensive genealogical texts like Kūlapañjikās state that this system was introduced by a semi-legendary Bengali Hindu king named Ādiśūra while some attribute it to Vallālasena (1160-79) with the aim of rejuvenating Hinduism following the end of the Buddhist Pālas in Bengal. In this system Bengali Brahmins were classified into 2 groups-kulīna & śrotriya. Kulīna Brahmins were the descendents of 5 Brahmins invited to settle in Bengal by the King from Kannauj while Srotriya Brahmins were descendents of pre-existing Brahmins. Ādiśura/Vallālasena declared the kulīnas to be superior to the śrotriyas & forbade pratiloma marriage between them, which resulted in situations like a kulīna girl being married off to a kulīna groom whose age is equal to that of her grandfather due to lack of other suitable kulīna match nearby (since it was considered sinful for a man to keep his daughter unmarried after the age of 12) & a kulīna man marrying en-masse kulīna girls far beyond his capacity to maintain & provide for, resulting in married kulīna girls remaining in their paternal household for their entire lives & raising their children without any support from her husband. The Vaidyas & Kāyasthas (traditionally regarded as only below Brahmins in Bengali Hindu hierarchy) also adopted this system of kulinism mimicking the Brahmins. Kulinism died out due to bans on polygamy & child marriage & influence of Communist rule.
My question is whether there is any scriptural injuction for banning pratiloma marriage between 2 groups belonging to the same caste ?
