Musannaf Ibn Abi Shayba 3:4029

Waki' narrated to us, he said: Sufyan narrated to us, from Khusayf, who said: I asked Sa'id ibn Jubayr about a verse after the two rak'ahs of the dawn [prayer], but he did not answer me. Then, when he prayed, he said: "Indeed, speech is disliked after them."