Many a generation have we annihilated after Noah. Your Lord is most efficient in dealing with the sins of His servants; He is fully Cognizant, Seer.
وَكَم أَهلَكنا مِنَ القُرونِ مِن بَعدِ نوحٍ وَكَفىٰ بِرَبِّكَ بِذُنوبِ عِبادِهِ خَبيرًا بَصيرًا
wa kam ahlaknaa minal qurooni min ba’di Nooh; wa kafaa bi Rabbika bizunoobi ‘ibaadihee Khabeeram Baseeraa