Musnad Abu Ya'la al-Mawsili 148:84

Abu Bakr ibn Abi Shaybah narrated to us, Ishaq ibn Yusuf narrated to us, Zakariya narrated to us, from Sa'id ibn Abi Burdah, from Anas ibn Malik, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, Allah is pleased with the servant who takes a morsel of food and praises Allah for it, or drinks a drink and praises Allah for it."