tataḥ - then; prāvartata - began; prāvṛṭ - the rainy season; sarva-sattva - of all living beings; samudbhavā - the source of generation; vidyotamāna - flashing with lightning; paridhiḥ - its horizon; visphūrjita - agitated (by thunder); nabhaḥ-talā - the sky.

Then the rainy season began, giving life and sustenance to all living beings. The sky began to rumble with thunder, and lightning flashed on the horizon.