Hadith: Whoever listens to the talk of some people while they dislike that, molten lead shall be poured into his ears on the Day of Judgment

عن عبد الله بن عباس رضي الله عنهما أن رسول الله صلى الله عليه وسلم قال: «من تَسَمَّع حديث قوم وهم له كارهون؛ صُبَّ في أذنيه الآنُكُ يوم القيامة».
[صحيح] - [رواه البخاري. ملحوظة: لفظ البخاري: "من استمع إلى حديث قوم"، و"من تَسَمَّعَ" رواه الخرائطي في مساويء الأخلاق (ح720)]

‘Abdullāh ibn ‘Abbās (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said: "Whoever listens to the talk of some people while they dislike that, molten lead shall be poured into his ears on the Day of Judgment."
Sahih/Authentic. - [Al-Bukhari with a similar wording]

Explanation

This Hadīth contains a severe warning to those who listen to the talk of others while they dislike that. Indeed, this is a bad manner amounting to a major sin. So, like fault, like punishment. Since a person commits this sin with his ears, he shall be punished in his ears: by the pouring of molten lead therein. This applies regardless of whether the talking people’s dislike is based on a valid reason or not. In fact, some people dislike that others should listen to their conversations even if they say nothing shameful, wrong, or unlawful. They just do not like to be heard by anyone.