´It was narrated that Mughirah bin Shu'bah said:` The Messenger of Allah (ﷺ) said: '"Whoever narrates a Hadith from me thinking it to be false, then he is one of the two liars."
Related hadith on this topic
Explanation & Benefits
Maulana Ataullah Sajid
In these narrations, the punishment for fabricating lies against the Messenger of Allah (sallallahu alayhi wa sallam) is mentioned, and in reality, lying against the Messenger of Allah (sallallahu alayhi wa sallam) is worse than all other lies in the world.
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 41
Shaykh Maulana Abdul Aziz Alvi
Hadith Commentary: Benefits and Issues:
Whatever is attributed to the Prophet (sallallahu alayhi wa sallam) becomes part of the religion and Shariah. However, the statement of anyone else does not become religion or Shariah. Therefore, attributing something to the Prophet (sallallahu alayhi wa sallam) is not so light and easy as it is to attribute something to someone else. There is not as much danger and fear in attributing a statement to someone else as there can be—and indeed should be—when attributing something to the Prophet (sallallahu alayhi wa sallam).
Source: Tuhfat al-Muslim: Commentary on Sahih Muslim, Page: 5