(176) بَابُ رَحْمَةِ الْبَهَائِمِ
'Abdullah ibn al-'As reported that the Prophet, may Allah blesshim and grant him peace, said, "Show mercy and you will be shown mercy.Forgive and Allah will forgive you. Woe to the vessels that catch words(i.e. the ears). Woe to those who persist and consciously continue in whatthey are doing."
Reference: Al-Adab Al-Mufrad 380
In-book reference: Book 20, Hadith 9
English translation: Book 20, Hadith 380