Brihat Parashara Hora Shastra
उपवेशं गतौ केतौ दद्रुरोगविवर्द्धनम् । अरिवातनृपव्यालचैरशंका समन्ततः ॥ १३६॥
if Ketu is in Sayan in other Rāśis, increased diseases will follow. If Ketu is in Upavesan, the native will suffer from ulcers and will have fear from enemies, windy diseases, snakes and thieves.
english translation
upavezaM gatau ketau dadrurogavivarddhanam । arivAtanRpavyAlacairazaMkA samantataH ॥ 136॥
hk transliteration by Sanscript