مَنْ رَغِبَ عَنْ سُنَّتِي، فَلَيْسَ مِنِّي
Whoever turns away from my Sunnah out of aversion is not following my way.
Source: البخاري
رَغِبَ عَنْ means to turn away from something out of aversion. This differs from رَغِبَ فِي, which can mean to desire something. The final ي in سُنَّتِي means “my.” The response فَلَيْسَ مِنِّي is a strong warning against deliberate rejection of the Prophet's way.
The concern is contemptuous turning away from Prophetic guidance, not every mistake caused by ignorance or every legitimate scholarly difference. The report invites serious commitment to the Sunnah with sound learning and respectful conduct, rather than hasty condemnation of individuals.