Natyashastra
क्षणो मुहूर्तो यानो वा दिवसो वापि नाटके । एकाङ्के स विधातव्यो बीजस्यार्थवशानुगः ॥ २५॥
In a play, whether it is a moment, an auspicious period, or a day, the entrance guide should designate the time and purpose in accordance with the action of the scene.
english translation
kSaNo muhUrto yAno vA divaso vApi nATake । ekAGke sa vidhAtavyo bIjasyArthavazAnugaH ॥ 25॥
hk transliteration by Sanscript