http://www.accesstoinsight.org/tipitaka/sn/sn35/sn35.088.than.html
"Well then, Punna. Now that I have instructed you with a brief instruction, in which country are you going to live?"
"Lord, there is a country called Sunaparanta. I am going to live there."
"Punna, the Sunaparanta people are fierce. They are rough. If they insult and ridicule you, what will you think?"
"If they insult and ridicule me, I will think, 'These Sunaparanta people are civilized, very civilized, in that they don't hit me with their hands.' That is what I will think, O Blessed One. That is what I will think, O One Well-gone."
"But if they hit you with their hands, what will you think?"
"...I will think, 'These Sunaparanta people are civilized, very civilized, in that they don't hit me with a clod.'..."
"But if they hit you with a clod...?"
"...I will think, 'These Sunaparanta people are civilized, very civilized, in that they don't hit me with a stick.'..."
"But if they hit you with a stick...?"
"...I will think, 'These Sunaparanta people are civilized, very civilized, in that they don't hit me with a knife.'..."
"But if they hit you with a knife...?"
"...I will think, 'These Sunaparanta people are civilized, very civilized, in that they don't take my life with a sharp knife.'..."
"But if they take your life with a sharp knife...?"
"If they take my life with a sharp knife, I will think, 'There are disciples of the Blessed One who — horrified, humiliated, and disgusted by the body and by life — have sought for an assassin, but here I have met my assassin without searching for him.' [1] That is what I will think, O Blessed One. That is what I will think, O One Well-gone."
"Good, Punna, very good. Possessing such calm and self-control you are fit to dwell among the Sunaparantans. Now it is time to do as you see fit."
Then Ven. Punna, delighting and rejoicing in the Blessed One's words, rising from his seat, bowed down to the Blessed One and left, keeping him on his right side. Setting his dwelling in order and taking his robe and bowl, he set out for the Sunaparanta country and, after wandering stage by stage, he arrived there. There he lived. During that Rains retreat he established 500 male and 500 female lay followers in the practice, while he realized the three knowledges and then attained total (final) Unbinding.