Brihat Parashara Hora Shastra
सुताधीशो हि नीचस्थो व्ययषष्ठाष्टमस्थितः । काकबन्ध्या भवेन्नारी सुते केतुबुधौ यदि ॥ ५॥
Should Putr‟s Lord be in fall in Ari, Randhr, or Vyaya Bhava, while Budh and Ketu are in Putr Bhava, the native‟s wife will give birth to one child only.
english translation
sutAdhIzo hi nIcastho vyayaSaSThASTamasthitaH । kAkabandhyA bhavennArI sute ketubudhau yadi ॥ 5॥
hk transliteration by Sanscript