Anandakanda 2.4.60

2.4.60

tāmraṃ tiktakaṣāyakaṃ ca madhuraṃ pāke'tha vīryoṣṇakaṃ koṣṇaṃ pittakaphāpahaṃ jaṭhararukkuṣṭhāmajūrtyantakṛt /
ūrdhvādhaḥpariśodhanaṃ ca viṣahṛtsthaulyāpahaṃ kṣutkaraṃ durnāmakṣayapāṇḍurogaśamanaṃ netryaṃ paraṃ lekhanam //

Copper is bitter and astringent, sweet in post-digestive effect, and hot in potency; slightly warm, it dispels pitta and kapha, and puts an end to abdominal pain, skin disease, uncooked digestive toxins, and fever. / It purges upward and downward, removes poison, dispels obesity, stimulates appetite, pacifies hemorrhoids, consumption, and anemia, is good for the eyes, and is a supreme scraping agent.