Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 155.74

155.74

tadeva nīraṃ pāpānāṃ śoṇitaṃ parivartate /
asipatravanaṃ cānyaddṛṣṭānyā mahatī śilā //

[but] that very water turns into blood for sinners; / and another, Asipatravana, was seen, and another huge stone slab;