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