ब्रह्मरन्ध्रकृतोत्थाना प्राणशक्तिरथासुरम् ।शनैराक्रमयामास गङ्गा सर्वमिवार्णवम्
In plain words
Then the power of prāṇa, its rising made from the brahmarandhra, gradually pervaded the asura throughout, as the Gaṅgā pervades the whole ocean.
ब्रह्मरन्ध्रकृतोत्थाना प्राणशक्तिरथासुरम् ।शनैराक्रमयामास गङ्गा सर्वमिवार्णवम्
Then the power of prāṇa, its rising made from the brahmarandhra, gradually pervaded the asura throughout, as the Gaṅgā pervades the whole ocean.