Skandapurana 6.3.43.29

6.3.43.29

lokānāṃ ca hitārthāya mahāpuṇyāvatāritā .
mānasaṃ vācikaṃ pāpaṃ snānānnaśyati karmajam .. 43.29 ..

for the welfare of the worlds, she was brought down, very holy;
sin born of action—mental and verbal—is destroyed by bathing [in her].