7:135
فَلَمَّا كَشَفْنَا عَنْهُمُ ٱلرِّجْزَ إِلَىٰٓ أَجَلٍ هُم بَـٰلِغُوهُ إِذَا هُمْ يَنكُثُونَ
falammā kashafnā ʿanhumu l-rij'za ilā ajalin hum bālighūhu idhā hum yankuthūna
but when We relieved them of the plague and gave them a fixed period [in which to fulfil their promise]- lo and behold!- they broke it.
But when We removed the punishment from them to a fixed term, which they had to reach, behold! they broke their word!