Yosef Karo, Yoreh Deah — Orach Chaim 103
“ And if one cooked in it within 24 hours something to which the first prohibited substance gives a positive taste, then if there was not 60 times of the second dish more than the original prohibition, the second is forbidden. But if the first dish was stirred with a spoon and subsequently thrust in a second dish, which it also taints, the second cooking pot is not forbidden. And also in the case of something that has a totally neutral flavor, such as a honey pot where people melt honey, despite the fact that there are bee legs in it, the pot is not forbidden, and so too every similar situation. ”
