Natyashastra
अह्नः प्रमाणं गत्वा तु कार्यलाभं विनिर्दिशेद् । तथालाभे तु कार्यस्य अङ्कच्छेदो विधीयते ॥ २४॥
After determining the time of the day, the entrance guide should indicate the success of the task. If the task is accomplished, then the guide should make a hand gesture to signal the end of the task.
english translation
ahnaH pramANaM gatvA tu kAryalAbhaM vinirdized । tathAlAbhe tu kAryasya aGkacchedo vidhIyate ॥ 24॥
hk transliteration by Sanscript