Srimad-Bhagavatam: Canto 1 - Chapter 1 - Verse 19

Sanskrit:

पञ्चदशं वामनकं कृत्वागादध्वरं बले: ।पदत्रयं याचमान: प्रत्यादित्सुस्त्रिपिष्टपम् ॥ १९ ॥

ITRANS:

pañcadaśaṁ vāmanakaṁkṛtvāgād adhvaraṁ baleḥpada-trayaṁ yācamānaḥpratyāditsus tri-piṣṭapam

Translation:

In the fifteenth incarnation, the Lord assumed the form of a dwarf brāhmaṇa [Vāmana] and visited the arena of sacrifice arranged by Mahārāja Bali. Although at heart He was willing to regain the kingdom of the three planetary systems, He simply asked for a donation of three steps of land.

Purport:

The almighty God can bestow upon anyone the kingdom of the universe from a very small beginning, and similarly He can take away the kingdom of the universe on the plea of begging a small piece of land.