Natyashastra
विधिना स्थापयेतज्ञो दृढान्मण्डपधारणे । अष्टौ स्तम्भान्पुनश्चैव तेषामुपरि कल्पयेत् ॥ ९३॥
The expert should install the pillars firmly according to the prescribed method, and then arrange eight additional pillars above them.
english translation
vidhinA sthApayetajJo dRDhAnmaNDapadhAraNe । aSTau stambhAnpunazcaiva teSAmupari kalpayet ॥ 93॥
hk transliteration by Sanscript