﴿ قَالَ بَصُرْتُ بِمَا لَمْ يَبْصُرُوا۟ بِهِۦ فَقَبَضْتُ قَبْضَةًۭ مِّنْ أَثَرِ ٱلرَّسُولِ فَنَبَذْتُهَا وَكَذَٰلِكَ سَوَّلَتْ لِى نَفْسِى ﴾

“He answered: "I have gained insight into something which they were unable to see: and so I took hold of a handful of the Apostle's teachings and cast it away: for thus has my mind prompted me [to act]."”

Please check ayah 20:98 for complete tafsir.