Quran 7:135 from Surah Al-A'raaf on Divine Marvels.
فَلَمَّا كَشَفۡنَا عَنۡهُمُ ٱلرِّجۡزَ إِلَىٰٓ أَجَلٍ هُم بَٰلِغُوهُ إِذَا هُمۡ يَنكُثُونَ
English translation: But when We removed from them the punishment till a (fixed) term (which) they were to reach [it] then they broke (the word)
Transliteration: falamma kashafna anhumu al-rij'za ila ajalin hum balighuhu idha hum yankuthuna