Surah Al-Isra' (The Night Journey), Verse 77

سُنَّةَ مَنْ قَدْ اَرْسَلْنَا قَبْلَكَ مِنْ رُّسُلِنَا وَلَا تَجِدُ لِسُنَّتِنَا تَحْوِیْلًا 

Sunnata man qad arsalnaa qablakamir Rusulinaa wa laa tajidu lisunnatinaa tahweelaa

“(This was Our) way with the messengers We sent before thee: thou wilt find no change in Our ways.”

Quran 17:77 (Yusuf Ali Translation)