OK. I am glad that you heard the story directly from Waharaka Thero’s discourse.
T did a search for “Pilindavaccha” and did not come up with a Tipitaka reference for that account. But sometimes Waharaka Thero accidentally gets the name wrong. It is possible the Arahant’s name is not “Pilindavaccha”.
– Also, this account may not be in a sutta, but in the Vinaya Pitaka.