Sura al-Shuʿarā 26:63

فَأَوْحَيْنَآ إِلَىٰ مُوسَىٰٓ أَنِ ٱضْرِب بِّعَصَاكَ ٱلْبَحْرَ فَٱنفَلَقَ فَكَانَ كُلُّ فِرْقٍ كَٱلطَّوْدِ ٱلْعَظِيمِ

fa-awḥaynā ilā mūsā ani iḍrib biʿaṣāka l-baḥra fa-infalaqa fa-kāna kullu firqin ka-l-ṭawdi l-ʿaẓīmi

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.