First of all, Nanda Maharaja was not willing, but out of the affection of Krsna… That is devotee, that Krsna… Devotees of Krsna, they are acting always in love for Krsna. So Nanda Maharaja changed his idea of worshiping Indra. Rather, on the contrary, all the ingredients he collected, he worshiped the Govardhana Hill and stopped Indra-yajna. So Indra became very much angry, and he sent the vicious cloud, and whole Vrndavana was inundated by flood. And Krsna showed that “Your power is not even competent to compare with the finger of My hand.” Therefore He lifted the Govardhana Hill with the finger of His left hand and saved all the people of Vrndavana.

From Srila Prabhupada’s lecture on Srimad-Bhagavatam 3.25.42 — December 10, 1974, Bombay