Is the Prophet (peace and blessings be upon him) protected from error in all its forms?
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The questioner : We know that the Prophet is protected from error.
The Shaykh : The issue, my dear, is first precise and second sensitive. It is not said that the Messenger is not protected, nor is it said that the Messenger does not err, because if it were said that he errs, it would be like saying he forgets, for both forgetting and error are the nature of humans. However, the Messenger is protected from sin and protected from error in conveying the message. Thus, protection is limited to sins and to the non-conveyance of the message. If a verse were revealed to him, for example, and he forgot to convey it to the people, that is impossible. But it is not impossible that he conveys the verse to the people and then forgets it, because he has fulfilled the obligation.
The Shaykh : The issue, my dear, is first precise and second sensitive. It is not said that the Messenger is not protected, nor is it said that the Messenger does not err, because if it were said that he errs, it would be like saying he forgets, for both forgetting and error are the nature of humans. However, the Messenger is protected from sin and protected from error in conveying the message. Thus, protection is limited to sins and to the non-conveyance of the message. If a verse were revealed to him, for example, and he forgot to convey it to the people, that is impossible. But it is not impossible that he conveys the verse to the people and then forgets it, because he has fulfilled the obligation.
Source
www.al-albany.com
The Arabic text is copied verbatim from the original source, without any edits.