(475) بَابُ مَنْ لَمْ يَرُدَّ السَّلامَ
Al-Hasan said, "Greeting is an act of obedience while the answeris a duty." (AR)
Reference (AR): Al-Adab Al-Mufrad 1040 (AR)
In-book reference (AR): Book 42, Hadith 77 (AR)
English translation (AR): Book 42, Hadith 1040 (AR)