Nabi ﷺ Warned Against Rejecting Ahaadith

Narrated Al-Miqdam ibn Ma’dikarib Radhiyallahu ‘Anhu:
The Prophet (ﷺ) said:
Beware! I have been given the Qur’an and something like it, yet the time is coming when a man replete on his couch will say: Keep to the Qur’an; what you find in it to be permissible treat as permissible, and what you find in it to be prohibited treat as prohibited
Sunan Abi Dawud 4604
Yet another narration:
عَنِ الْمِقْدَامِ بْنِ مَعْدِيكَرِبَ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ قَالَ “ أَلاَ إِنِّي أُوتِيتُ الْكِتَابَ وَمِثْلَهُ مَعَهُ أَلاَ يُوشِكُ رَجُلٌ شَبْعَانُ
عَلَى أَرِيكَتِهِ يَقُولُ عَلَيْكُمْ بِهَذَا الْقُرْآنِ فَمَا وَجَدْتُمْ فِيهِ مِنْ حَلاَلٍ فَأَحِلُّوهُ وَمَا وَجَدْتُمْ فِيهِ مِنْ حَرَامٍ فَحَرِّمُوهُ
The Prophet (ﷺ) said:
“Let me not find one of you reclining on his couch when he hears something regarding me which I have commanded or forbidden and saying: We do not know. What we found in Allah’s Book we have followed.”