Sahih Muslim #6708 · The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship

Sahih MuslimAbu Huraira reported Allah's Messenger
Sahih Muslim · Book 45 · The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship
Sahih Muslim · كتاب 45 · كتاب البر والصلة والآداب
Souls are troops collected together and those who familiarised with each other (in the heaven from where these come) would have affinity, with one another (in the world) and those amongst them who opposed each other (in the Heaven) would also be divergent (in the world).
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، - يَعْنِي ابْنَ مُحَمَّدٍ - عَنْ سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏
"‏ الأَرْوَاحُ جُنُودٌ مُجَنَّدَةٌ فَمَا تَعَارَفَ مِنْهَا ائْتَلَفَ وَمَا تَنَاكَرَ مِنْهَا اخْتَلَفَ ‏"‏ ‏.‏
Reference : Sahih Muslim 6708In-book reference : Book 45, Hadith 204