I was reading Markandeya Purana and found that there is a mention of Duryodhana being a son in law of Balarama. I am not able to find more information about this in Markandeya Purana. I am looking for information on how Duryodhana became the son in law of Balarama and who was Balarama's daughter in this story. The below quote is taken from Canto VI - Baladeva’s brahmanicide of Markandeya Purana.
The plough-armed Rāma, knowing the perfect affection of Kṛṣṇa for Arjuna, deliberated much—“Can what has been done be better done? Without Kṛṣṇa, assuredly, I will not go near Duryodhana; or how, siding with the Pāṇḍavas, shall I slay king Duryodhana, my royal son-in-law and disciple? Therefore I will go neither to Arjuna nor to king Duryodhana. I will myself bathe myself at holy bathing places, so long as it conduces to the ending of the Kurus and Pāṇḍavas.”
