CC Madhya 9.29

ramante yogino ’nante
satyānande cid-ātmani
iti rāma-padenāsau
paraṁ brahmābhidhīyate
Synonyms: 
ramante — take pleasure; yoginaḥ — transcendentalists; anante — in the unlimited; satya-ānande — real pleasure; cit-ātmani — in spiritual existence; iti — thus; rāma — Rāma; padena — by the word; asau — He; param — supreme; brahma — truth; abhidhīyate — is called.
Translation: 
“ ‘The Supreme Absolute Truth is called Rāma because the transcendentalists take pleasure in the unlimited true pleasure of spiritual existence.’
Purport: 

This is the eighth verse of the Śata-nāma-stotra of Lord Rāmacandra, which is found in the Padma Purāṇa.