Sea
Sea bā-ḥā-rā Corpus Count
The triliteral root bā ḥā rā (ب ح ر) occurs 42 times in the Quran.
Bahr - Ships - Storms - The Deep = Sea
Sea of ink
(18:109) Say, "If the sea (Arab. الْبَحْرُ, l-baḥru) were an inkwell for the words of my Lord, then the sea (Arab. الْبَحْرُ, l-baḥru) would run out before the words of my Lord run out;" even if We were to bring another like it for its aid.
(31:27) If all the trees on the earth were made into pens, and the sea (Arab. وَالْبَحْرُ, wal-baḥru) (of ink) were supplied by seven more seas (Arab. أَبْحُرٍ, abḥurin), words of God would not run out. God is Noble, Wise.
Two Seas - Bahrain
(25:53) And He is the One Who merges the Two seas: this one is isolated, fresh, and this one is salty, bitter. He made between them a partition and an inviolable barrier.
(35:12) And the Two seas are not equal. One is fresh and palatable, good to drink, while the other is salty and bitter. From each of them you eat tender meat, and you extract jewelry to wear. You see the ships sailing through them, seeking His provisions; and perhaps you may be appreciative.