Mukhtasar Bukhari

Narrated from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The person who will have the lightest punishment in Hell, Allah Almighty will ask him: If you had the wealth equal to the whole earth at this moment, would you give it to free yourself? He will say: Certainly. Allah Almighty will say: I had asked you for something much easier than this when you were in the loins of Adam, that you should not associate anyone with Me, but you did not accept and persisted in shirk."