Arthashastra
प्रतिपन्नं ब्रूयात् "सप्त रात्रम् इह सपुत्र दारेण प्रेक्षा प्रहवण पूर्वं वस्तव्यम्" इति ॥
When the king agrees to do so, he may be requested to come and remain at the spot with his wives and children for seven nights to witness the sacrificial performance.
english translation
pratipannaM brUyAt "sapta rAtram iha saputra dAreNa prekSA prahavaNa pUrvaM vastavyam" iti ॥
hk transliteration by Sanscript