Musannaf Ibn Abi Shayba 17:1335

'Affan narrated to us, he said: Hammad bin Zayd narrated to us, he said: Ayyub narrated to us, he said: Sa'id bin Jubayr narrated a hadith to us one day, so I stood up to him and said: "Repeat it." He said: "Not every hour do I milk so that I may drink."