Musannaf Ibn Abi Shayba 33:1486

Muhammad ibn Abdullah ibn al-Zubayr narrated to us, he said: Muhammad ibn Khalid al-Dabbi narrated to us, from a sheikh, from Abu al-Darda’, that he said: "Seek refuge in Allah from the humility of hypocrisy." It was said: "O Abu al-Darda’, and what is the humility of hypocrisy?" He said: "That you see the body humble, while the heart is not humble."