Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Allah says: O son of Adam! Free yourself for My worship, I will fill your heart with richness (contentment), and I will remove your poverty. But if you do not do so, I will keep you busy with work and will not remove your poverty." Its chain is Hasan. Narrated by Ahmad and Ibn Majah.