My dear Vidura, carrier of bows and arrows, all the demigods who were performing the sacrifice took their bath at the confluence of the Ganges and the Yamunā after completing the yajña performance. Such a bath is called avabhṛtha-snāna. After thus becoming purified in heart, they departed for their respective abodes.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
आप्लुत्यावभृथं यत्र गङ्गा यमुनयान्विता । विरजेनात्मना सर्वे स्वं स्वं धाम ययुस्ततः
āplutyāvabhṛthaṃ yatra gaṅgā yamunayānvitā | virajenātmanā sarve svaṃ svaṃ dhāma yayustataḥ
SB 4.2.35