Nafi narrated to me that 'Abdullah said that Allah's Messenger (ﷺ) forbade the Shighar. I asked Nafi', "What is the Shighar?" He said, "It is to marry the daughter of a man and marry one's daughter to that man (at the same time) without Mahr (in both cases); or to marry the sister of a man and marry one's own sister to that man without Mahr." Some people said, "If one, by a trick, marries on the basis of Shighar, the marriage is valid but its condition is illegal." The same scholar said regarding Al-Mut'a, "The marriage is invalid and its condition is illegal." Some others said, "The Mut'a and the Shighar are permissible but the condition is illegal."
Sahih al-Bukhari Book 90, Hadith 7
← Previous Hadith Sa'd bin 'Ubada Al-Ansari sought the verdict of Allah's Messenger (ﷺ) regarding a vow made by his mother who had died before fulfilling it. Allah's Messenger (ﷺ) said, "Fulfill it on her behalf." Some people said, "If the number of camels reaches twenty, then their owner has to pay four sheep as Zakat; and if their owner gives them as a gift or sells them in order to escape the payment of Zakat cunningly before the completion of a year, then he is not to pay anything, and if he slaughters them and then dies, then no Zakat is to be taken from his property."

Sahih al-Bukhari Book 90, Hadith 6 Next Hadith → `Ali was told that Ibn `Abbas did not see any harm in the Mut'a marriage. `Ali said, "Allah's Messenger (ﷺ) forbade the Mut'a marriage on the Day of the battle of Khaibar and he forbade the eating of donkey's meat." Some people said, "If one, by a tricky way, marries temporarily, his marriage is illegal." Others said, "The marriage is valid but its condition is illegal."

Sahih al-Bukhari Book 90, Hadith 8