54:11
فَفَتَحْنَآ أَبْوَٰبَ ٱلسَّمَآءِ بِمَآءٍۢ مُّنْهَمِرٍۢ ١١
Saheeh International
Then We opened the gates of the heaven with rain pouring down
Tafsir of "Ibn Kathir" (English)
So, We opened the gates of the heaven with water Munhamir.As-Suddi said about Munhamir, "It means abundant.