Brihat Parashara Hora Shastra
शंखमुक्ताप्रवालाद्यैर्लाभो भवति निश्चितः । कुम्भांशे च तडागादिकारको जायते जनः ॥ ७॥
Makar Navāńś in this respect denotes gains from water dwelling beings and conch, pearl, coral etc. If it is Kumbh Navāńś, holding Atma Karak, the native will construct tanks etc.
english translation
zaMkhamuktApravAlAdyairlAbho bhavati nizcitaH । kumbhAMze ca taDAgAdikArako jAyate janaH ॥ 7॥
hk transliteration by Sanscript