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.'" (Using translation from Tirmidhī 3866)
"إِذَا رأيتُمَ الذِينَ يَسُبُّونَ أَصْحَابي فقولوا: لَعْنَةُ الله علَى شَرِّكم".