A class on Srimad Bhagavatam 7.9.7 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on February 14, 1976 in Mayapur, India.
A transcript of the class can be found here: https://goo.gl/9W7uMJ.
Srimad Bhagavatam 7.9.7
astauṣīd dharim ekāgra-
manasā susamāhitaḥ
prema-gadgadayā vācā
tan-nyasta-hṛdayekṣaṇaḥ
Prahlāda Mahārāja fixed his mind and sight upon Lord Nṛsiṁhadeva with full attention in complete trance. With a fixed mind, he began to offer prayers in love with a faltering voice.