وَمِنۡهُمُ ٱلَّذِينَ يُؤۡذُونَ ٱلنَّبِيَّ وَيَقُولُونَ هُوَ أُذُنٞۚ قُلۡ أُذُنُ خَيۡرٖ لَّكُمۡ يُؤۡمِنُ بِٱللَّهِ وَيُؤۡمِنُ لِلۡمُؤۡمِنِينَ وَرَحۡمَةٞ لِّلَّذِينَ ءَامَنُواْ مِنكُمۡۚ وَٱلَّذِينَ يُؤۡذُونَ رَسُولَ ٱللَّهِ لَهُمۡ عَذَابٌ أَلِيمٞ
And among them (the hypocrites) are those who trouble* the Herald of the Hidden (the Prophet) and say, “He is only ears**”; say “He is a listener for your good, he believes in Allah and believes in what the Muslims say, and is a mercy for the Muslims among you”; and for those who trouble the Noble Messenger of Allah, is a painful punishment. (*To disrespect / trouble the Holy Prophet – peace and blessings be upon him – is blasphemy. **He believes whatever he is told.)
Tafsir:
Hypocrites annoy the Prophet
Allah says, some hypocrites bother the Messenger of Allah ﷺ by questioning his character, saying,
هُوَ أُذُنٌ
(he is (lending his) ear), to those who say anything about us; he believes whoever talks to him. Therefore, if we went to him and swore, he would believe us. Similar was reported from Ibn `Abbas, Mujahid and Qatadah. Allah said,
قُلْ أُذُنُ خَيْرٍ لَّكُمْ
(Say: "He listens to what is best for you"), he knows who's saying the truth and who is lying,
يُؤْمِنُ بِاللَّهِ وَيُؤْمِنُ لِلْمُؤْمِنِينَ
(he believes in Allah; has faith in the believers), he believes the believers,
وَرَحْمَةٌ لِّلَّذِينَ ءَامَنُواْ مِنكُمْ
(and is a mercy to those of you who believe"), and a proof against the disbelievers,
وَالَّذِينَ يُؤْذُونَ رَسُولَ اللَّهِ لَهُمْ عَذَابٌ أَلِيمٌ
(But those who annoy Allah's Messenger, will have a painful torment.)