Charak Samhita
सहजानि त्रिदोषाणि यानि चाभ्यन्तरां वलिम्। जायन्तेऽर्शांसि संश्रित्य तान्यसाध्यानि निर्दिशेत्॥२८॥
Congenital/hereditary hemorrhoids caused by aggravation of three doshas and hemorrhoids located in the internal sphincter of the anus are also considered as incurable.
english translation
sahajAni tridoSANi yAni cAbhyantarAM valim। jAyante'rzAMsi saMzritya tAnyasAdhyAni nirdizet॥28॥
hk transliteration by Sanscript