﴿ وَمَا نُرِيهِم مِّنْ ءَايَةٍ إِلَّا هِىَ أَكْبَرُ مِنْ أُخْتِهَا ۖ وَأَخَذْنَٰهُم بِٱلْعَذَابِ لَعَلَّهُمْ يَرْجِعُونَ ﴾

“although each sign that We showed them was weigh­tier than the preceding one: and [each time] We took them to task through suffering, so that they might return [to Us].”

(And every token) sign (that We showed them was greater than its sister (token)) that We sent before it, even so they refused to believe, (and we grasped them with the torment) with the flood, locusts, lice, frogs, blood, shortage of foodstuffs and years of drought, (that haply they might turn again) that haply they might desist from their disbelief.