﴿ فَلَمَّآ ءَاسَفُونَا ٱنتَقَمْنَا مِنْهُمْ فَأَغْرَقْنَٰهُمْ أَجْمَعِينَ ﴾

“But when they continued to challenge Us, We inflicted Our retribution on them, and drowned them all:”

فَلَمَّا آسَفُونَا (So, when they provoked our anger, - 43:55). Since Allah Almighty is pure of the states of anger and sorrow, the meaning is that their behavior caused Us to decide that they should be punished. (Ruh-ul-Ma’ ani)