Yahya related to me from Malik that he had heard that Said ibnal-Musayyab and Sulayman ibn Yasar said, "The idda of a slave-girlwhen her husband dies is two months and five days." (IT)
USC-MSA web (English) reference: Book 29, Hadith 93 (IT)
Arabic reference (IT): Book 29, Hadith 1258 (IT)