Sahih Muslim 3248—Ibn Uraij reported: 'Ati' reported that Jabir b. Abdullah came to perform 'Umra, and we came to his abode, and the people asked him about different things, and then they made a mention of temporary marriage, whereupon he said: Yes, we had been benefiting ourselves by this temporary marriage during the lifetime of the Holy Prophet and during the time of Abu Bakr and ‘Umar.
Some hadith claim that it was Umar, rather than Muhammad, who outlawed Muta:
Sahih Muslim 3250—Abu Nadra reported: While I was in the company of Jabir b. Abdullah, a person came to him and said that Ibn 'Abbas and Ibn Zubair differed on the two types of Mut'a (Tamattu’ of Hajj 1846 and Tamattu’ with women), whereupon Jabir said: We used to do these two during the lifetime of Allah's Messenger. Umar then forbade us to do them, and so we did not revert to them.
Not surprisingly, since these are Sunni hadith, some Sunni scholars support temporary marriage. Popular Wahhabi Cleric Muhammed al-Arifi has even issued a fatwa allowing Jihadists fighting in Syria to hire prostitutes:
Yes, Jihad and prostitution. Welcome to Islam!