Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 25
Sanskrit:
इत्थं मिथोऽतथ्यमतज्ज्ञभाषितंश्रुत्वा विचिन्त्येत्यमृषा मृषायते ।रक्षो विदित्वाखिलभूतहृत्स्थित:स्वानां निरोद्धुं भगवान् मनो दधे ॥ २५ ॥
ITRANS:
itthaṁ mitho ’tathyam ataj-jña-bhāṣitaṁśrutvā vicintyety amṛṣā mṛṣāyaterakṣo viditvākhila-bhūta-hṛt-sthitaḥsvānāṁ niroddhuṁ bhagavān mano dadhe
Translation:
The Supreme Personality of Godhead, Śrī Kṛṣṇa, who is situated as antaryāmī, the Supersoul, in the core of everyone’s heart, heard the boys talking among themselves about the artificial python. Unknown to them, it was actually Aghāsura, a demon who had appeared as a python. Kṛṣṇa, knowing this, wanted to forbid His associates to enter the demon’s mouth.