The Vessantara Jataka

Tenth episode, Sakabab, Indra: Seeing that Vessantara has passed all tests of selfless generosity, the gods fear he will endure the supreme sacrifice and bestow his beloved wife on the first mendicant who asks for her. Accordingly, Indra (in green) appears as a Brahmin and makes the request for Madsi. Vessantara willingly gives her away, pouring water over the supposed Brahmin's hands. Indra immediately assumes is godself, heavens open, the earth shakes, and the oceans roar as the gods acknowledge Vessantara is worthy of Buddhahood.