In an Islamic context, "Hadith" are the sayings of the Prophet and the Shia Imams. The accuracy of them, however, is very difficult for the average people to prove. One must have extensive theological education to do so, and often only the clerics or those who study the Hadith could say whether or not a phrase truly belongs to the Prophet or Imams.
I found this image of what seems to be a more religious, conservative Iranian woman participating in a march. Her sign indicates the Hadith she quotes is from Fatima, the daughter of Prophet Mohammed. Or maybe she just made it up herself?:
“Temporary Marriage is the sweetest pleasure that ever happens to a Muslim Woman.”
I can’t say if this Hadith really belongs to her, but I can assure you that this Hadith is often used by men and those who wish to see more laws inforcing the freedom of taking temporary wives. Many Iranian feminists are known for campaigning against this Islamic tradition in which a man and woman can enter a contracted marriage for any indicated time ranging from hours to months, known in Iran as "Sigheh".