Surah Al-Qamar 54:12

وَفَجَّرْنَا ٱلْأَرْضَ عُيُونًا فَٱلْتَقَى ٱلْمَآءُ عَلَىٰٓ أَمْرٍ قَدْ قُدِرَ

And caused the earth to burst with springs, and the waters met for a matter already predestined.

Translation: Saheeh International

Tafsir

and We made the earth burst forth with springs that flowed forth and the waters the waters of the heaven and the earth met for a purpose a circumstance that was preordained a matter which had been decreed since pre-eternity namely their destruction by drowning.

Excerpt from Tafsir al-Jalalayn, commentary on 54:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.