Vatapi who was capable of assuming any form at will at once assumed the form of a goat. After being cooked that food was given to the Brahmanas in order to kill them.
मेघरूपी च वातापि: कामरूप्यभवत् क्षणात्। संस्कृत्य च भोजयति ततो विप्रं जिघांसति॥