Natyashastra
मन्दवातायनोपेतो निर्वातो धीरशब्दवान् । तस्मान्निवातः कर्तव्यः कर्तृभिर्नाट्यमण्डपः ॥ ८१॥
The stage should be free from winds, with a calm and steady atmosphere, and there should be no sound of wind. Therefore, the construction of a wind passage should be avoided in the design of the stage.
english translation
mandavAtAyanopeto nirvAto dhIrazabdavAn । tasmAnnivAtaH kartavyaH kartRbhirnATyamaNDapaH ॥ 81॥
hk transliteration by Sanscript