Quran 3:103 from Surah Aal-i-Imraan on Divine Marvels.
وَٱعۡتَصِمُواْ بِحَبۡلِ ٱللَّهِ جَمِيعٗا وَلَا تَفَرَّقُواْۚ وَٱذۡكُرُواْ نِعۡمَتَ ٱللَّهِ عَلَيۡكُمۡ إِذۡ كُنتُمۡ أَعۡدَآءٗ فَأَلَّفَ بَيۡنَ قُلُوبِكُمۡ فَأَصۡبَحۡتُم بِنِعۡمَتِهِۦٓ إِخۡوَٰنٗا وَكُنتُمۡ عَلَىٰ شَفَا حُفۡرَةٖ مِّنَ ٱلنَّارِ فَأَنقَذَكُم مِّنۡهَاۗ كَذَٰلِكَ يُبَيِّنُ ٱللَّهُ لَكُمۡ ءَايَٰتِهِۦ لَعَلَّكُمۡ تَهۡتَدُونَ
English translation: And hold firmly to (the) rope (of) Allah all together and (do) not be divided And remember (the) Favor (of) Allah on you when you were enemies then He made friendship between your hearts then you became by His Favor brothers And you were on (the) brink (of) pit of the Fire then He saved you from it Thus makes clear Allah for you His Verses so that you may (be) guided
Transliteration: wa-i'tasimu bihabli al-lahi jami'an wala tafarraqu wa-udh'kuru ni'mata al-lahi alaykum idh kuntum a'daan fa-allafa bayna qulubikum fa-asbahtum bini'matihi ikh'wanan wakuntum ala shafa huf'ratin mina al-nari fa-anqadhakum min'ha kadhalika yubayyinu al-lahu lakum ayatihi la'allakum tahtaduna