Mahabharata 1.167.4

ततः पाशैस्तदात्मानं गाढं बद्ध्वा महामुनिःतस्या जले महानद्या निममज्ज सुदुःखितः

tataḥ pāśaistadātmānaṃ gāḍhaṃ baddhvā mahāmuniḥtasyā jale mahānadyā nimamajja suduḥkhitaḥ

Our plain-language meaning of this verse is waiting for scholar review.