What is the ruling on lying about the Messenger of Allah?

Question:
This person is asking about lying about the Messenger (peace and blessings be upon him); what is its reality?

Answer:
Its reality is attributing to the Messenger (peace and blessings be upon him) something that is not authentic from him, saying, "The Messenger of Allah (peace and blessings be upon him) said ," when this is not authentic from the Messenger (peace and blessings be upon him). If he invented this thing and attributed it to the Messenger, if he is the one who originated this thing on his own and attributed it to the Messenger, this is clear lying, clear lying, and may Allah protect us from it; his place will be in the Fire. This also includes the one who does not verify the hadiths, who does not verify the authenticity of the hadiths, but narrates them while not knowing whether they are established or not. It includes those who do not verify the hadiths they mention; do not narrate a hadith or mention a hadith about the Messenger, even if it is in the books, until you verify its authenticity, either by it being from the narration of the trustworthy ones, like al-Bukhari and Muslim and the imams of hadith who adhere to the authentic hadiths, or if you have knowledge of the chain, if you have knowledge of the chains in yourself, you know the authentic from the inauthentic, then there is no harm in narrating what is established from the Messenger (peace and blessings be upon him), whether the imams established it or you know the established from the unestablished, so narrate what is authentic from the Messenger (peace and blessings be upon him). But if you narrate a hadith and you know that it is a lie, or you do not know, then you must repent to Allah the Mighty and Majestic.
And in the hadith: So do not say, "The sin is on the one who said it; I am merely a transmitter, a mere narrator." Do not say that, for you are a partner with him, because you transmitted this lie and spread it among the people. Lying about the Messenger (peace and blessings be upon him) includes two matters. The first, which is more severe, is that you invent this matter yourself and attribute it to the Messenger (peace and blessings be upon him). The second is that you transmit what another person invented and lied about, and you spread it among the people. One must verify these matters. Allah (Exalted and Majestic is He) says: meaning, verify.