فَاَوْحَيْنَآ اِلٰى مُوْسٰٓى اَنِ اضْرِبْ بِّعَصَاكَ الْبَحْرَۗ فَانْفَلَقَ فَكَانَ كُلُّ فِرْقٍ كَالطَّوْدِ الْعَظِيْمِ ۚ ( الشعراء: ٦٣ )
Fa awhainaaa ilaa Moosaaa anidrib bi'asaakal bahra fanfalaqa fakaana kullu firqin kattawdil 'azeem (aš-Šuʿarāʾ 26:63)
Then We inspired to Moses, "Strike with your staff the sea," and it parted, and each portion was like a great towering mountain. (Ash-Shu'ara  : 63)
1 Mufti Taqi Usmani
So We revealed to Mūsā saying, “Strike the sea with your staff.” So it was severed apart, and each part became like a big mountain.