Two are the Mut'as which were not permissible but only for us, i. e. temporary marriage with women and Tamattu' in Hajj.
Sahih Muslim Book 15, Hadith 176
← Previous Hadith Tamattu' in Hajj was a special concession for us.

Sahih Muslim Book 15, Hadith 175 Next Hadith → I came to Ibrahim al-Nakha'I and Ibrahim Taimi and said: I intend to combine 'Umra and Hajj this year, whereupon Ibrahim al-Nakha'i said: But your father did not make such intention. Ibrahim narrated on the authority of, his father that he passed by Abu Dharr (Allah be pleased with him) at Rabdha, and made a mention of that, whereupon he said: It was a special concession for us and not for you.

Sahih Muslim Book 15, Hadith 177