Musnad Ahmad 30:1040

The Messenger of Allah, peace and blessings of Allah be upon him, said: "While Ayyub was washing himself naked, locusts of gold fell upon him, and Ayyub began gathering them into his garment. His Lord called out to him: 'O Ayyub, have I not made you rich enough to be independent of what you see?' He said: 'Yes, O my Lord, but I have no independence from Your blessing.'"