33. Ahzab · Verse 15

سورة الأحزاب
15

وَلَقَدۡ كَانُواْ عَٰهَدُواْ ٱللَّهَ مِن قَبۡلُ لَا يُوَلُّونَ ٱلۡأَدۡبَٰرَۚ وَكَانَ عَهۡدُ ٱللَّهِ مَسۡـُٔولٗا

And yet they had already covenanted with Allah not to turn their backs, and a covenant with Allah must (surely) be answered for.