Surah Al-Ahzaab 33:15 — سُورَةُ الأَحۡزَابِ

وَلَقَدْ كَانُوا۟ عَٰهَدُوا۟ ٱللَّهَ مِن قَبْلُ لَا يُوَلُّونَ ٱلْأَدْبَٰرَ ۚ وَكَانَ عَهْدُ ٱللَّهِ مَسْـُٔولًۭا ﴿15﴾

And verily they had already sworn unto Allah that they would not turn their backs (to the foe). An oath to Allah must be answered for.

Surah Al-Ahzaab (The Clans), ayah 15 of 73. Recited by Abdul Basit Abdus Samad (Murattal) (عبد الباسط عبد الصمد المرتل).