Yahya related to me from Malik that he had heard that Said ibnal-Musayyab used to say, "Sleep is disapproved of before isha andconversation after it." (ID)
App reference (ID): Book 7, Hadith 6 (ID)
USC-MSA web (English) reference: Book 7, Hadith 6 (ID)
Arabic reference (ID): Book 7, Hadith 260 (ID)