Caitanya-caritāmṛta 19.172
lakṣaṇaṁ bhakti-yogasya nirguṇasya hy udāhṛtam ahaituky avyavahitā yā bhaktiḥ puruṣottame
[lakshanam bhakti-yogasya nirgunasya hy udaahritam ahaituky avyavahitaa yaa bhaktih purushottame]
Blended reading (Sanskrit + English inline)
lakṣaṇaṁ bhakti-yogasya nirguṇasya hy udāhṛtam ahaituky avyavahitā yā bhaktiḥ puruṣottame
“ ‘These are the characteristics of transcendental loving service to Puruṣottama, the Supreme Personality of Godhead: it is causeless, and it cannot be obstructed in any way.
My note
Source: vedabase.io