We believe that Allah, Exalted be He, had created water before He created the heavens and earth. The Prophet (may Allah's peace and blessings be upon him) said: "There was Allah and nothing else before Him and His Throne was over the water, and He then created the heavens and the earth." [Narrated by Muslim (2713), Abu Dāwūd (5051), At-Tirmidhi (3400), and Ibn Mājah (3831)] And Allah Almighty created from water every living thing. He says: {We created from water every living thing.} [Surat al-Anbiyā’: 30] And that He made it one of the signs of His lordship and divinity. He says: {He Who made the earth a resting-place for you, and the sky a canopy; and sends down rain from the sky, and brings forth fruits thereby as a provision for you. So do not set up rivals to Allah while you know.} [Surat al-Baqarah: 22]
Allah Almighty also says: {And on the earth there are neighboring [yet different] tracts of land, and gardens of grapevines, grains and palm trees – some growing in clusters from one root or standing alone. They are all irrigated with the same water, yet We cause some of them to excel others in taste. Indeed, there are signs in this for people of understanding.} [Surat ar-Ra‘d: 4] And He says: {It is He Who merges the two bodies of water: one fresh and palatable and the other salty and bitter, and He has made between them a barrier and an insurmountable partition. It is He Who created human beings from water, then made between them bonds of kinship and marriage, for your Lord is Most Capable.} [Surat al-Furqān: 53-54] So, He created from water two bodies of water and put a barrier between them preventing each from spilling into the other. And He created from water human beings and placed ties of kinship and marriage among them. Blessed be Allah, the Best of all creators. There are numerous other similar signs.
Allah Almighty also cites water as a proof of the Resurrection. He says: {And among His signs is that you see the land withered, but when We send down rain upon it, it stirs and swells. He Who gives it life will surely give life to the dead, for He is Most Capable of all things.} [Surat Fussilat: 39]
And He made it one of His soldiers, supporting His allies therewith. He says: {[Remember] when He caused drowsiness to overcome you as an assurance from Him, and He sent down rain from the sky to purify you and to remove Satan’s whispers from you, and to strengthen your hearts and to steady your footsteps.} [Surat al-Anfāl: 11] And He defeated His enemies with it. Allah Almighty says: {So he called upon his Lord: "I am overpowered, so help me!" So We opened the gates of the sky with water pouring down in torrents, and We caused the earth to burst forth with springs, then the waters met for a preordained purpose.} [Surat al-Qamar: 10-12] There are other circumstances and incidents in which Allah Almighty rendered water a reason for supporting His allies or defeating His enemies.