﴿ وَءَاتَيْنَٰهُم مِّنَ ٱلْءَايَٰتِ مَا فِيهِ بَلَٰٓؤٌۭا۟ مُّبِينٌ ﴾

“and gave them such signs [of Our grace] as would clearly presage a test.”

(And We gave them portents) signs (wherein was a clear trial) and it is this that saved them from Pharaoh and drowning, and He sent down for them quails and honey in the wilderness, etc.; it is also said that (wherein was a clear trial) means: wherein was a great blessing.