CC Madhya 15.22

advaita kahe, — satya kahi, nā kariha kopa
laguḍa phirāite pāra, tabe jāni gopa
Synonyms: 
advaita kahe — Advaita Ācārya says; satya kahi — I speak the truth; kariha kopa — please do not be angry; laguḍa — stick, staff; phirāite pāra — if You can wheel around; tabe jāni — then I shall understand; gopa — cowherd boy.
Translation: 
At this time Śrīla Advaita Ācārya said, “Please do not be angry. I speak the truth. I shall know that You are a cowherd boy only if You can wheel this rod about.”