Surah Al-An'am (The Cattle), Verse 34

وَلَقَدْ كُذِّبَتْ رُسُلٌ مِّنْ قَبْلِكَ فَصَبَرُوْا عَلٰی مَا كُذِّبُوْا وَاُوْذُوْا حَتّٰۤی اَتٰىهُمْ نَصْرُنَا وَلَا مُبَدِّلَ لِكَلِمٰتِ اللّٰهِ وَلَقَدْ جَآءَكَ مِنْ نَّبَاۡݡ الْمُرْسَلِیْنَ ۟

Wa laqad kuzzibat Rusulum min qablika fasabaroo 'alaa maa kuzziboo wa oozoo hattaaa ataahum nasrunaa; wa laa mubaddila li Kalimaatil laah; wa laqad jaaa'aka min naba'il mursaleen

“Rejected were the messengers before thee: with patience and constancy they bore their rejection and their wrongs, until Our aid did reach them: there is none that can alter the words (and decrees) of Allah. Already hast thou received some account of those messengers.”

Quran 6:34 (Yusuf Ali Translation)