Natyashastra
ततश्चोत्थापनं कार्यं परिवर्तनमेव च । नान्दी शुष्कावकृष्टा च रङ्गद्वारं तथैव च ॥ १४॥
Then, the raising (of the curtain) and the change should be done, along with the Nandi, the dried-up and lowered curtain, and also the entrance to the stage.
english translation
tatazcotthApanaM kAryaM parivartanameva ca । nAndI zuSkAvakRSTA ca raGgadvAraM tathaiva ca ॥ 14॥
hk transliteration by Sanscript