आपो वा अर्कः ।तद्यदपां शर आसीत्तत्समहन्यत ।सा पृथिव्यभवत् ।तस्यामश्राम्यत् ।तस्य श्रान्तस्य तप्तस्य तेजोरसो निरवर्तताग्निः ॥बृह.१,२.२ ॥
In plain words
The waters are the arka. What was the froth of the waters was pressed together and became the earth. Upon it he wearied himself; and from him, wearied and heated, the essence of his splendour came forth as fire.