SB 10.12.25
ittham mitho ’tathyam ataj-jña-bhasitam
srutva vicintyety amrsa mrsayate
rakso viditvakhila-bhuta-hrt-sthitah
svanam niroddhum bhagavan mano dadhe
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The Supreme Personality of Godhead, Sri Krsna, who is situated as antaryami, 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 Aghasura, a demon who had appeared as a python. Krsna, knowing this, wanted to forbid His associates to enter the demon’s mouth.