Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 19

Sanskrit:

सुरभिरुवाचकृष्ण कृष्ण महायोगिन् विश्वात्मन् विश्वसम्भव । भवता लोकनाथेन सनाथा वयमच्युत ॥ १९ ॥

ITRANS:

surabhir uvācakṛṣṇa kṛṣṇa mahā-yoginviśvātman viśva-sambhavabhavatā loka-nāthenasa-nāthā vayam acyuta

Translation:

Mother Surabhi said: O Kṛṣṇa, Kṛṣṇa, greatest of mystics! O Soul and origin of the universe! You are the master of the world, and by Your grace, O infallible Lord, we have You as our master.

Purport:

Śrīla Viśvanātha Cakravartī Ṭhākura points out here that mother Surabhi is feeling great ecstasy as she repeats the words “Kṛṣṇa, Kṛṣṇa.” Kṛṣṇa lifted Govardhana Hill by His mystic power and thus protected the cows of Vṛndāvana, whereas her so-called master, Indra, had tried to kill them. Thus Surabhi now clearly understands that it is not the demigods but rather the Supreme God, Kṛṣṇa Himself, who is her real master forever.