Hadithcore
Al-Adab Al-Mufrad, 392

Regarding the ayat:

"Fear Allah and put things right between you," (8:1), Ibn 'Abbas said, "This is an injunction from Allah to the believers to fear Allah and to put things right between them."

حَدَّثَنَا مُوسَى، قَالَ‏:‏ حَدَّثَنَا عَبَّادُ بْنُ الْعَوَّامِ، قَالَ‏:‏ أَخْبَرَنَا سُفْيَانُ بْنُ الْحُسَيْنِ، عَنِ الْحَكَمِ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ‏:‏ ‏{‏فَاتَّقُوا اللَّهَ وَأَصْلِحُوا ذَاتَ بَيْنِكُمْ‏}‏، قَالَ‏:‏ هَذَا تَحْرِيجٌ مِنَ اللهِ عَلَى الْمُؤْمِنِينَ أَنْ يَتَّقُوا اللَّهَ وَأَنْ يُصْلِحُوا ذَاتَ بَيْنِهِمْ‏.‏

References2 variants
In-Book Reference
Book 21, Hadith 8
English Reference
Book 21, Hadith 392