Brihat Parashara Hora Shastra
यन्त्रमन्त्रौ तथा विद्यां बुद्धेश्चैव प्रबन्धकम्। पुत्रराज्यापभ्रांशादीन् पश्येत् पुत्रालयाद् बुधः॥ ६॥
Indications of Putr Bhava. The learned should deduce from Putr Bhava amulets, sacred spells, learning, knowledge, sons, royalty (or authority), fall of position etc.
english translation
yantramantrau tathA vidyAM buddhezcaiva prabandhakam। putrarAjyApabhrAMzAdIn pazyet putrAlayAd budhaH॥ 6॥
hk transliteration by Sanscript