আক্ষিপ্তঃ কালসাম্যেন প্রবেশঃ স্যাৎ প্রবর্তকঃ ॥ ১৩৫ ॥
pravesah syat pravartakah
aksiptah-set in motion; kala-samyena-by a suitable time; pravesah-the entrance; syat-should be; pravartakah-named pravartaka.
" 'When the entrance of the actors is set in motion by the arrival of a suitable time, the entrance is called pravartaka.'
This verse is from Nataka-candrika (12) by Srila Rupa Gosvami.