Natyashastra
उपक्षेपेण काव्यस्य हेतुयुक्तिसमाश्रया । सिद्धेनामन्त्रणा या तु विज्ञेया स प्ररोचना ॥ २९॥
The conversation that is based on reason and supported by the purpose of the narrative, which is achieved through a proper invocation, is known as Praroçanā (stimulus).
english translation
upakSepeNa kAvyasya hetuyuktisamAzrayA । siddhenAmantraNA yA tu vijJeyA sa prarocanA ॥ 29॥
hk transliteration by Sanscript