Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 2

Sanskrit:

भूम्यां निपतितौ तत्र दद‍ृशुर्यमलार्जुनौ ।बभ्रमुस्तदविज्ञाय लक्ष्यं पतनकारणम् ॥ २ ॥

ITRANS:

bhūmyāṁ nipatitau tatradadṛśur yamalārjunaubabhramus tad avijñāyalakṣyaṁ patana-kāraṇam

Translation:

There they saw the fallen yamala-arjuna trees on the ground, but they were bewildered because even though they could directly perceive that the trees had fallen, they could not trace out the cause for their having done so.

Purport:

Considering all the circumstances, had this been done by Kṛṣṇa? He was standing on the spot, and His playmates described that this had been done by Him. Had Kṛṣṇa actually done this, or were these merely stories? This was a cause of bewilderment.