Brihat Parashara Hora Shastra
भाग्येशे भाग्यसंयुक्ते सङ्ख्याता नव सूनवः । पुत्रभाग्यगते जीवे सुतेशे बलसंयुते ॥ २६॥
There will be eight sons, if Guru is in Putr, or Dharm Bhava, while Putr‟s Lord is endowed with strength and Dhan‟s Lord is in Karm Bhava.
english translation
bhAgyeze bhAgyasaMyukte saGkhyAtA nava sUnavaH । putrabhAgyagate jIve suteze balasaMyute ॥ 26॥
hk transliteration by Sanscript