As Dhruva Mahārāja, the King’s son, kept himself steadily standing on one leg, the pressure of his big toe pushed down half the earth, just as an elephant being carried on a boat rocks the boat left and right with his every step.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यदैकपादेन स पार्थिवार्भक- स्तस्थौ तदङ्गुष्ठनिपीडिता मही । ननाम तत्रार्धमिभेन्द्रधिष्ठिता तरीव सव्येतरतः पदे पदे
yadaikapādena sa pārthivārbhaka- stasthau tadaṅguṣṭhanipīḍitā mahī | nanāma tatrārdhamibhendradhiṣṭhitā tarīva savyetarataḥ pade pade
SB 4.8.79