Musannaf Ibn Abi Shayba 33:474

Abu Usama narrated to us, from Imran bin Za'idah bin Nashit, from his father, from Abu Khalid al-Walibi, from Abu Hurairah, who said: "Indeed, Allah says: 'O son of Adam, devote yourself to My worship; I will fill your heart with richness and block your poverty. And if you do not do so, I will fill your hands with busyness and I will not block your poverty.'"