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." (TR)
App reference (TR): Book 7, Hadith 6 (TR)
USC-MSA web (English) reference: Book 7, Hadith 6 (TR)
Arabic reference (TR): Book 7, Hadith 260 (TR)