Saṃkhyāvarta (संख्यावर्त्त): Commencement of Yajña at the Dawn of Tretāyuga
तदा विवादः सुमहानिन्द्रस्यासीन्महर्षिभिः / जङ्गमस्थावरैः कैर्हि यष्टव्यमिति चोच्यते
tadā vivādaḥ sumahānindrasyāsīnmaharṣibhiḥ / jaṅgamasthāvaraiḥ kairhi yaṣṭavyamiti cocyate
Then a mighty dispute arose between Indra and the great seers: it was debated which among the moving and the unmoving should be offered in sacrifice.