Ash-Shu'ara' - 26:63

فَأَوْحَيْنَا إِلَى مُوسَى أَنِ اضْرِب بِّعَصَاكَ الْبَحْرَ فَانفَلَقَ فَكَانَ كُلُّ فِرْقٍ كَالطَّوْدِ الْعَظِيمِ
[26:63]
Then We revealed to Musa: Strike the sea with your staff. So it had cloven asunder, and each part was like a huge mound.
Then We told Moses by inspiration: "Strike the sea with thy rod." So it divided, and each separate part became like the huge, firm mass of a mountain.
Then We inspired Moses, saying: Smite the sea with thy staff. And it parted, and each part was as a mountain vast.