that the Messenger of Allah ﷺ said: "If you see those who abuse my Companions, then say: 'May Allah's curse be upon the worst of you.'"  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا رَأَيْتُمُ الَّذِينَ يَسُبُّونَ أَصْحَابِي فَقُولُوا لَعْنَةُ اللَّهِ عَلَى شَرِّكُمْ