Prophets: Are they sinless?

Q525 :A well-known concept says that prophets are sinless, but a tradition of the Prophet says that all human beings are sinners. Please comment.

A525 : You speak of a well-known concept, but I do not know it. Speaking to the Prophet, Allah says in the Qur'an: "Know that there is no deity save Allah and seek forgiveness for your sins, and for the believers, men and women." (49;19). If Allah tells the Prophet to include in his supplication a prayer for forgiveness of his own sin, then the concept you are speaking about is false. We know, however, that Allah has forgiven the Prophet all his sins, even before they are committed. We also know that the Prophet was the most obedient of Allah's servants. Once Aisha saw the Prophet standing up in worship in the middle of the night, despite being tired. She asked him, why did he make such a great effort when he has already been forgiven all his sins. He replied rhetorically: "Should I not, then, be a grateful servant of Allah?" The Hadith to which you are referring is authentic. It states: "All human beings are prone to error and the best of those who err are those who repent."

Our Dialogue ( Source : Arab News - Jeddah )