karmadhāraya ādyaḥ syād dvigus tatpuruṣo’paraḥ
karmadhāraya ādyaḥ syād dvigus tatpuruṣo’paraḥ |
bahuvrīhir atha dvandvo’vyayībhāvaḥ ṣaḍ īritāḥ ||
(Prayoga-ratnamālā)
“First is the karmadhāraya, next the dvigu and tatpuruṣa, and then the bahuvrīhi, dvandva, and avyayībhāva. They [i.e., samāsas] are said to be six.”