question #1 Sahih Muslim 1249, Book 15, Hadith 233 : What were the two practices that were debated between Ibn Abbas and Ibn Zubair?

While I was in the company of Jibir, a person came and said: There is difference of opinion amomg Ibn Abbas and Ibn Zubair about two Mut’as (benefits, Tamattul in Hajj and temporary marriage with women), whereupon jibir said: We have been doing this during the lifetime of Allah’s Messenger (way peace be upon him), and then ‘Umar forbade us to do so, and we never resorted to them.