Lord Śrī Kṛṣṇa, the Personality of Godhead, along with Balarāma, played like a human being, and so masked He performed many superhuman acts.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कृतवान् किल वीर्याणि सह रामेण केशवः । अतिमर्त्यानि भगवान् गूढः कपटमानुषः
kṛtavān kila vīryāṇi saha rāmeṇa keśavaḥ | atimartyāni bhagavān gūḍhaḥ kapaṭamānuṣaḥ
SB 1.1.20