ekada-once upon a time; deva-satre-in an assembly of the demigods; tu-indeed; gandharva-of the inhabitants of Gandharvaloka; apsarasam-and the inhabitants of Apsaroloka; ganah-all; upahutah-were invited; visva-srgbhih-by the great demigods known as the prajapatis; hari-gatha-upagayane-on an occasion of kirtana for glorifying the Supreme Lord.