The Bodhisatta was once a lion. While taking a drink from a lake after having just eaten some big game, he saw a boar and thought it would make a good meal some other day when he was hungry again. Knowing that if the boar saw him it might not return to the lake, the Bodhisatta crept away silently. But the boar did see him and was such a fool he thought the Bodhisatta slunk away out of fear, so the boar challenged him to a fight. He answered that he would come back to fight the boar in a week.
Excited about the forthcoming fight, the boar told all his friends and relatives and they managed to convince him that he was stupid and was surely going to die – and the lion would probably kill all of them as well. They told him he could get out of the fight by going over to the camp of the wilderness ascetics who lived near the lake and rolling around in their feces for the next seven days and then on the day of the fight, moisten himself in the morning dew and stand downwind of the lion’s approach.
The plan worked. When the Bodhisatta arrived, he complimented the boar on his clever trick and said he would not touch such filth, so he spared his life. The boar boasted of his “victory,” but the rest of the herd feared the lion would return and they all moved away to another place.
In the Lifetime of the Buddha
One evening at the Buddha’s monastery, the elder Moggallana asked the elder Sariputta various questions about dharma, and many people, both disciples and laity, sat enthralled listening to his clear answers. An elderly disciple who was going senile wanted to impress everyone by asking a question that would stump Sariputta. But his question – “Give me a decision in discrimination or in undiscrimination, in refutation or in acceptation, in distinction or in counter-distinction” – was utter nonsense. Embarrassed for the man, Sariputta decided this was a good time to end the night’s assembly and without addressing the elderly disciple, he got up and went to his room. Moggallana did the same. Many people in the audience were furious at this disciple for causing the discussion to end and they approached him. He ran away from the mob and fell into a cesspool, getting completely covered in filth. When the people saw him their anger changed to pity and some of them went to wake the Buddha to tell him about what had happened.
The failing disciple was an earlier birth of the boar and the Buddha told them all this story so they knew this was not the first time the elderly disciple had challenged a superior and ended up covered in filth.