وَمِنْهُمُ الَّذِيْنَ يُؤْذُوْنَ النَّبِيَّ وَيَقُوْلُوْنَ هُوَ اُذُنٌ ۗقُلْ اُذُنُ خَيْرٍ لَّكُمْ يُؤْمِنُ بِاللّٰهِ وَيُؤْمِنُ لِلْمُؤْمِنِيْنَ وَرَحْمَةٌ لِّلَّذِيْنَ اٰمَنُوْا مِنْكُمْۗ وَالَّذِيْنَ يُؤْذُوْنَ رَسُوْلَ اللّٰهِ لَهُمْ عَذَابٌ اَلِيْمٌ ( التوبة: ٦١ )
Wa minhumul lazeena yu'zoonan nabiyya wa yaqooloona huwa uzun; qul uzunu khairil lakum yu'minu billaahi wa yu'minu lilmu mi neena wa rahmatul lillazeena aamanoo minkum; wallazeena yu'zoona Rasoolal laahi lahum 'azaabun aleem (at-Tawbah 9:61)
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 Allah and believes the believers and [is] a mercy to those who believe among you." And those who abuse the Messenger of Allah – for them is a painful punishment. (At-Tawbah  : 61)
1 Mufti Taqi Usmani
And among them (the hypocrites) there are those who hurt the Prophet and say, “He is just an ear” (that is, he hears and believes everything). Say, “He gives ear to that which is good for you; he believes in Allah and trusts the believers and is a mercy for those of you who (pretend to) believe.” And those who hurt the Messenger of Allah, for them there is a painful punishment.