A mountain cave in the Sitavana, near Rájagaha (D.ii.116). A conversation which took place there between Sáriputta and Upasena, just before the latter's death, is recorded in the Samyutta Nikáya. Upasena died of snake bite (S.iv.40). The cave was used as a residence by monks who come to Rájagaha 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 rájá of Roruva. ThagA.i.200.