It is narrated from Hazrat Saeed bin Huwairith that I heard Ibn Abbas (may Allah be pleased with them) say: We were present with the Noble Prophet (peace and blessings be upon him) when he returned from relieving himself, and food was brought to him. It was said to him: Why did you not perform ablution? The Prophet (peace and blessings be upon him) replied: "I do not have to pray, so why should I perform ablution?"