Brihat Parashara Hora Shastra
द्विस्वभावगते शुक्रे स्वोच्चे तद्राशिनायके । दारेशे बलसंयुक्ते बहुदारसमन्वितः ॥ २१॥
There will be many wives, if Śukr is in a Dual Rāśi, while its Lord is in exaltation, as Yuvati Lord is endowed with strength.
english translation
dvisvabhAvagate zukre svocce tadrAzinAyake । dAreze balasaMyukte bahudArasamanvitaH ॥ 21॥
hk transliteration by Sanscript