Surah At-Tawbah 9:61

وَمِنْهُمُ ٱلَّذِينَ يُؤْذُونَ ٱلنَّبِىَّ وَيَقُولُونَ هُوَ أُذُنٌ ۚ قُلْ أُذُنُ خَيْرٍ لَّكُمْ يُؤْمِنُ بِٱللَّهِ وَيُؤْمِنُ لِلْمُؤْمِنِينَ وَرَحْمَةٌ لِّلَّذِينَ ءَامَنُوا۟ مِنكُمْ ۚ وَٱلَّذِينَ يُؤْذُونَ رَسُولَ ٱللَّهِ لَهُمْ عَذَابٌ أَلِيمٌ

And among them are those who abuse the Prophet and say, "He is an ear." Say, "[It is] an ear of goodness for you that believes in Allāh and believes the believers and [is] a mercy to those who believe among you." And those who abuse the Messenger of Allāh - for them is a painful punishment.

Translation: Saheeh International

Tafsir

And of them the hypocrites are those who injure the Prophet by casting aspersions on him and communicating to others what he says in confidence saying when they are forbidden from doing this lest it should reach him ‘He is only a listener!’ that is he listens to anything that is said and accepts it so that when we …

Excerpt from Tafsir al-Jalalayn, commentary on 9:61, via Quran.com. The reader has the full commentary and 9 more tafsirs.