اللَّهُمَّ أَلِّفْ بَيْنَ قُلُوبِنَا وَأَصْلِحْ ذَاتَ بَيْنِنَا وَاهْدِنَا سُبُلَ
“O Allah, bring our hearts together, reconcile between us, guide us to ways of peace"
(57) (Abdulläh ibn Mas' üd. Sunan Abi Dâwúd #825) According to Sayyidnā Abdulläh ibn Mas üd Prophet Muhammad used to teach this du'a to his Companions for saying in the şalät before the ending salām. [1] [2]