Anandakanda 2.5.20

2.5.20

eva pralīyate doṣo girijo lohasaṃbhavaḥ /
kāntalohamayaṃ cūrṇaṃ gomūtre'ṣṭaguṇe pacet //

Thus the mountain-born defect originating in iron is destroyed. / One should boil powder made of loadstone in eight times its quantity of cow's urine;