Bhagavad Gita 13.11

Unswerving devotion to Me, with concentration on Me and Me alone, a love for solitude, and indifference to social life;

मयि चानन्ययोगेन भक्ितरव्यभिचारिणी।विविक्तदेशसेवित्वमरतिर्जनसंसदि॥

mayi cānanyayogena bhakitaravyabhicāriṇī|viviktadeśasevitvamaratirjanasaṃsadi||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).