Sayyiduna Abu Hurairah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "Whoever misses a fast of Ramadan without an allowance granted by Allah, then making up for that fast cannot be done even if he fasts for his entire life." In the narration of Muhammad bin Ja'far, there is this addition: "Even if he fasts (for his entire life), the compensation will not be fulfilled."