Analysis of information sources in references of the Wikipedia article "Mudra" in English language version.
One day the Buddha walked through a village. Devadatta fed alcohol to a particularly furious elephant named Nalagiri and had him attack the Buddha. The raging bull stormed towards the Buddha, who reached out his hand to touch the animal's trunk. The elephant sensed the metta, the loving kindness of the Buddha, which calmed him down immediately. The animal stopped in front of the Buddha and bowed on his knees in submission.