(401) بَابُ الأرْوَاحُ جُنُودٌ مُجَنَّدَةٌ
'A'isha said, "I heard the Messenger of Allah, may Allah blesshim and grant him peace, say, 'The arwah are a massed army. When they alreadyknow each other, they are friendly. When they do not know each other, theydisagree.'" (ID)
Reference (ID): Al-Adab Al-Mufrad 900 (ID)
In-book reference (ID): Book 38, Hadith 13 (ID)
English translation (ID): Book 38, Hadith 900 (ID)