(Al-Ahraf) 7 : 135
فَلَمَّا كَشَفْنَا عَنْهُمُ الرِّجْزَ إِلَىٰ أَجَلٍ هُمْ بَالِغُوهُ إِذَا هُمْ يَنْكُثُونَ
Then whenever We removed the distress from them for a period which they have to fulfill, behold! They are breaking the words.