Brihat Parashara Hora Shastra
रवौ वेदान्तविच्चैव गीतज्ञश्च प्रजायते । केतौ च गणितज्ञः स्याज्ज्योतिःशास्त्रविशारदः ॥ ९१॥
Sūrya in the 5th from Karakāńś will make one learned in Vedanta and music. Ketu will make one a mathematician and skilful in Jyotish.
english translation
ravau vedAntaviccaiva gItajJazca prajAyate । ketau ca gaNitajJaH syAjjyotiHzAstravizAradaH ॥ 91॥
hk transliteration by Sanscript