عن أبي هريرة، قال: قال رسول الله صلى الله عليه وسلم: «من كذب علي متعمدا فليتبوأ مقعده من النار».
[صحيح] - [متفق عليه]
Abu Hurayrah (may Allah be pleased with him) reported: The Prophet (may Allah’s peace and blessings be upon him) said: "Whoever tells lies about me intentionally should take his seat in Hellfire."
Sahih/Authentic. - [Al-Bukhari and Muslim]
The Prophet (may Allah’s peace and blessings be upon him) states in this Hadīth that whoever tells a lie about him - namely, falsely attributing to him any statement or action. "Intentionally": He lies purposefully. But if he does so unintentionally, due to forgetfulness or mistake, he incurs no sin, as unanimously agreed by the scholars. "Should take his seat in Hellfire": He should occupy a place in Hellfire, which will be his abode and place of residence. "Should take his seat" was said as a warning or a supplication meaning: May Allah give him a seat. This is because telling lies about the Prophet (may Allah’s peace and blessings be upon him) leads to changes to the religion and annulment of Shar‘i rulings, and it is false attribution of words and deeds to the noble Prophet (may Allah’s peace and blessings be upon him) whose statements are strong arguments and his deeds are infallible. So, it is not permissible to ascribe a Hadīth to him before verifying its authenticity or without clarifying to people that it is not authentic to warn them about it.