Abdullah ibn Amr reported: The Prophet, peace and blessings be upon him, was upon the pulpit and he said, “Be merciful to others and you will receive mercy. Forgive others and Allah will forgive you. Woe to those who neglect the word. Woe to those who persist their in wrongdoing while they know better.”

Source: Musnad Ahmad 7001, Grade: Sahih (authentic) according to As-Suyuti

Abu Al-Yaman said, “Neglecting the word are those for whom the words enter their ears and then exit.”

Source: Hadith Abi Ali Ash-Sha’rani 55

عَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّهُ قَالَ وَهُوَ عَلَى الْمِنْبَرِ ارْحَمُوا تُرْحَمُوا وَاغْفِرُوا يَغْفِرْ اللَّهُ لَكُمْ وَيْلٌ لِأَقْمَاعِ الْقَوْلِ وَيْلٌ لِلْمُصِرِّينَ الَّذِينَ يُصِرُّونَ عَلَى مَا فَعَلُوا وَهُمْ يَعْلَمُونَ

7001 مسند أحمد مسند المكثرين من الصحابة مسند عبد الله بن عمرو بن العاص رضي الله تعالى عنهما

المحدث السيوطي خلاصة حكم المحدث صحيح

قَالَ أَبُو الْيَمَانِ أَقْمَاعُ الْقَوْلِ الَّذِينَ يَدْخُلُ الْكَلامُ فِي آذَانِهِمْ وَيَخْرُجُ

55 حديث أبي علي الشعراني

http://dailyhadith.abuaminaelias.com/2013/12/19/hadith-on-mercy-be-merciful-and-forgive-others-so-allah-will-forgive-you/