Śrī Caitanya Caritamrta · Text Madhya 19.212
শমো মন্নিষ্ঠতা বুদ্ধেরিতি শ্রীভগবদ্বচঃ ।
তনিষ্ঠা দুর্ঘটা বুদ্ধেরেতাং শান্তরতিং বিনা ॥ ২১২ ॥
śamo man-niṣṭhatā buddher
iti śrī-bhagavad-vacaḥ
tan-niṣṭhā durghaṭā buddher
etāṁ śānta-ratiṁ vinā
“ ‘These are the words of the Supreme Personality of Godhead: “When one’s intelligence is fully attached to My lotus feet but one does not render practical service, one has attained the stage called śānta-rati, or śama.” Without śānta-rati, attachment to Kṛṣṇa is very difficult to achieve.’
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.