Husain bin Abi Waqqas said: l heard ʿUthman bin ʿAffan ؓ say: What prevented me from narrating from the Messenger of Allah ﷺ was not the fact that was not the most knowledgeable of his Companions about what he said, but I bear witness that I heard him say: “Whoever says something about me that I did not say, let him take his place in Hell.” And he said: Husain was the most aware of his companions of what he said.
عَنْ رَسُولِ اللهِ ﷺ أَنْ لَا أَكُونَ أَوْعَى أَصْحَابِهِ عَنْهُ وَلَكِنِّي أَشْهَدُ لَسَمِعْتُهُ يَقُولُ مَنْ قَالَ عَلَيَّ مَا لَمْ أَقُلْ فَلْيَتَبَوَّأْ مَقْعَدَهُ مِنَ النَّارِ وَقَالَ حُسَيْنٌ أَوْعَى صَحَابَتِهِ عَنْهُ