Bhagavatapurana 4.24.59

4.24.59

na yasya cittaṃ bahir-artha-vibhramaṃ tamo-guhāyāṃ ca viśuddham āviśat /
yad-bhakti-yogānugṛhītam añjasā munir vicaṣṭe nanu tatra te gatim //

59. That sage surely discerns Thy nature and Thy way, whose mind is not bewildered by external objects, but being favoured with devotion and free from all impurity, does not lose itself in the cave of darkness (ignorance).