Tafseer Ibn Kathir of AL ISRAA' [77]

سُنَّةَ مَن قَدْ أَرْسَلْنَا قَبْلَكَ مِن رُّسُلِنَا وَلاَ تَجِدُ لِسُنَّتِنَا تَحْوِيلاً

[That is Our] established way for those We had sent before you of Our messengers; and you will not find in Our way any alteration.