Musannaf Ibn Abi Shayba 13:2232

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Hammad ibn Zayd, from Ayyub, who said: Abu Qilabah used to urge me toward [studying] the Ahzab (the chapters of the Quran) and seeking knowledge. And Abu Qilabah said: "Wealth is [found in] well-being."