Brihat Parashara Hora Shastra
अधुना नाभसा योगाः कथ्यन्ते द्विजसत्तम । द्वात्रिंशात् तत्प्रभेदास्तु शतघ्नाष्टादशोन्मिताः ॥ १॥
O excellent of the Brahmins, explained below are 32 Nabhash Yogas, which have a total of 1800 different varieties.
english translation
adhunA nAbhasA yogAH kathyante dvijasattama । dvAtriMzAt tatprabhedAstu zataghnASTAdazonmitAH ॥ 1॥
hk transliteration by Sanscript