Latest / Short Machshava On The Daf by Rabbi Yechezkel Hartman
Yevamos 32: Kevurah
The reason that for Kevurah purposes Issur is Chal on Issur.
Source Sheet: https://res.cloudinary.com/ouinternal/image/upload/outorah pdf/gyfkr1v4zc5cwgpsr6wf.pdf
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