Mahabharata 3.81.162

सोमतीर्थे नरः स्नात्वा तीर्थसेवी कुरूद्वहसोमलोकमवाप्नोति नरो नास्त्यत्र संशयः

somatīrthe naraḥ snātvā tīrthasevī kurūdvahasomalokamavāpnoti naro nāstyatra saṃśayaḥ

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