'A'isha said, "I heard the Messenger of Allah, may Allah bless him and grant him peace, say, 'The arwah are a massed army. When they already know each other, they are friendly. When they do not know each other, they disagree.'"

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ الأرْوَاحُ جُنُودٌ مُجَنَّدَةٌ فَمَا تَعَارَفَ مِنْهَا ائْتَلَفَ وَمَا تَنَاكَرَ مِنْهَا اخْتَلَفَ

Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "The spirits are massed armies. Those of them that knew one another are friendly. Those that did not know one another disagree."

قَالَ رَسُولُ اللهِ ﷺ الأرْوَاحُ جُنُودٌ مُجَنَّدَةٌ فَمَا تَعَارَفَ مِنْهَا ائْتَلَفَ وَمَا تَنَاكَرَ مِنْهَا اخْتَلَفَ