Gemara:

Chullin,  Moed Katan,  Sukkah,  Yevamot 

Halacha:

Bein Adam l'Chaveiro,  Lifnei Iver 

Parsha:

Acharei Mot,  Kedoshim 

Collections: Rabbi Akiva Koenigsberg: Torah Temima

References: Succah: 10b ,  Yevamot: 14b ,  Chullin: 111b ,  Moed Katan: 5a ,  Ritva: ,  Torah Temimah:  

Description

Based on the comments of the Torah Temimah, this shiur discusses the possible requirement for someone to warn his fellow Jew who is enganging in an activity which that other Jew would consider forbidden but the onlooker considers it to be permitted.