Yahya said that Malik had said from Da'ud ibn al-Husayn that heheard Abu Ghatafan ibn Tarif al-Muriyi say, "Zayd ibn Thabit al-Ansariand Ibn Muti had a dispute about a house which they shared. They wentto Marwan ibn al-Hakam who was the Amir of Madina. Marwan decided thatZayd ibn Thabit must take an oath on the mimbar. Zayd ibn Thabit said,'I swear to it where I am.' Marwan said, 'No, by Allah! only in theplace of sorting out claims (i.e. the mimbar).' Zayd ibn Thabit beganto take an oath that his right was true, and he refused to take anoath near the mimbar. Marwan ibn al-Hakam began to wonder at that."Malik said, "I do not think that anyone should be made totake an oath near the mimbar for less than a fourth of a dinar, andthat is three dirhams."
USC-MSA web (English) reference: Book 36, Hadith 12
Arabic reference: Book 36, Hadith 1416