Hi rabbi, is there a source in the torah that boiling a pot makes it kosher? Thanx

Hello,

The Torah writes in במדבר לא:כב-כג that a vessel which was captured from non-Jews must be koshered. The Torah writes that a vessel which can withstand fire, if it absorbed non-kosher food through fire, must be koshered by heating it up. Similarly, if the vessel absorbed non-kosher food through cooking, one must use cooking to remove the taste of the non-kosher food.

See Introduction to Koshering Utensils for a slightly longer explanation.

All the best