Brihat Parashara Hora Shastra
कुजदृष्टौ तु जातस्य पिटकादिगदो भवेत् । केतुदृष्टौ तु ग्रहणी जलरोगोऽथवा द्विज ॥ ३७॥
The Drishti of Mangal on the 5th from Karakāńś will bring boils, or ulcers, Ketu‟s Drishti on the 5th from Karakāńś will cause dysentery and other diseases, caused by (impure) water.
english translation
kujadRSTau tu jAtasya piTakAdigado bhavet । ketudRSTau tu grahaNI jalarogo'thavA dvija ॥ 37॥
hk transliteration by Sanscript