Natyashastra
चतुःषष्टिकरान्कुर्याद्दीर्घत्वेन तु मण्डपम् । द्वात्रिंशतं च विस्तारन्मर्त्यानां यो भवेदिह ॥ १७॥
The playhouse (maṇḍapa) should be constructed with a length of forty-eight hands, and its extension should be thirty-two hands for human beings.
english translation
catuHSaSTikarAnkuryAddIrghatvena tu maNDapam । dvAtriMzataM ca vistAranmartyAnAM yo bhavediha ॥ 17॥
hk transliteration by Sanscript