śuddha-sattva-viśeṣātmā
prema-sūryāmśu-sāmya-bhāk
rucibhiś citta-masṛṇya-
kṛd asau bhāva ucyate
śuddha-sattva - by unadulterated goodness; viśeṣa - distinguished; ātmā - whose nature; prema - of love of God; sūrya - like the sun; amśu - a ray; sāmya-bhāk - which is similar to; rucibhiḥ - by different tastes; citta - of the heart; masṛṇya - softness; kṛt - which causes; asau - that softness; bhāvaḥ - emotion; ucyate - is called.
This verse is found in the Bhakti-rasāmṛta-sindhu (1.3.1).