Bhakti-rasāmṛta-sindhu .9.3
atra uparasāḥ –
[atra uparasaah –]
prāptaiḥ sthāyi-vibhāvānu-bhāvādyais tu virūpatām |
[praaptaih sthaayi-vibhaavaanu-bhaavaadyais tu viroopataam |]
śāntādayo rasā eva dvādaśoparasā matāḥ ||3||
[shaantaadayo rasaa eva dvaadashoparasaa mataah ||3||]
Blended reading (Sanskrit + English inline)
atra uparasāḥ –
prāptaiḥ sthāyi-vibhāvānu-bhāvādyais tu virūpatām |
śāntādayo rasā eva dvādaśoparasā matāḥ ||3||
When the sthāyi-bhāva, vibhāva and anubhāva take on distorted forms, the twelve rasas starting with śānta-rasa are called uparasas.
My note
Source: vedabase.io