Bhagavatapurana 4.8.44

4.8.44

prāṇāyāmena tri-vṛtā prāṇendriya-mano-malam /
śanair vyudasyābhidhyāyen manasā guruṇā gurum //

with thy steady mind (do thou) meditate on the Preceptor (Sri Hari).

43 & 44. At proper times (morning, mid-day and evening), do thou bathe in the sacred waters of the Kālindī, perform the acts of worship proper to thee; and dwelling there and having arranged for thy steady and comfortable seat and posture, got rid of the impurity (of being fickle or unsteady) affecting the *Pranas*, *Indriya*, and *Manas* by means of the threefold Prānāyāma and