SB 8.9.27
pita-praye ’mrte devair
bhagavan loka-bhavanah
pasyatam asurendranam
svam rupam jagrhe harih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The Supreme Personality of Godhead is the best friend and well-wisher of the three worlds. Thus when the demigods had almost finished drinking the nectar, the Lord, in the presence of all the demons, disclosed His original form.