وَآتَيْنَاهُم مِّنَ الْآيَاتِ مَا فِيهِ بَلَاءٌ مُّبِينٌ And We gave them the clear signs in which there was a manifest blessing. (44:33) " The word 'signs' refers to the miracles of the staff, the shining hand and others. The word 1 bala' has two senses: (1) blessing; and (2) trial. Here both senses are possible. (Qurtubi).