A mountain cave in the Sitavana, near Rājagaha (D.ii.116). A conversation which took place there between Sāriputta and Upasena, just before the latter's death, is recorded in the Samyutta Nikāya. Upasena died of snake bite (S.iv.40). The cave was used as a residence by monks who come to Rājagaha from afar (E.g., Vin.ii.76).
Buddhaghosa says (SA.iii.10) that the cave was so called because it was shaped like a snake's hood. It was here that the Buddha met and preached to Tissa (13), the rājā of Roruva. ThagA.i.200.