Surah Al-A'raf 7:136

فَٱنتَقَمْنَا مِنْهُمْ فَأَغْرَقْنَـٰهُمْ فِى ٱلْيَمِّ بِأَنَّهُمْ كَذَّبُوا۟ بِـَٔايَـٰتِنَا وَكَانُوا۟ عَنْهَا غَـٰفِلِينَ

So We took retribution from them, and We drowned them in the sea because they denied Our signs and were heedless of them.

Translation: Saheeh International

Tafsir

So We exacted retribution from them and therefore We drowned them in the sea al-yamm denotes salty waters for the reason that they denied Our signs and were heedless of them not reflecting upon them.

Excerpt from Tafsir al-Jalalayn, commentary on 7:136, via Quran.com. The reader has the full commentary and 9 more tafsirs.