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Religion and mythology

In Sumerian mythology, the Tigris was created by the god Enki, who filled the river with flowing water.

In Hittite and Hurrian mythology, Aranzah (or Aranzahas in the Hittite nominative form) is the Hurrian name of the Tigris River, which was deified. He was the son of Kumarbi and the brother of Teshub and Tašmišu, one of the three gods spat out of Kumarbi's mouth onto Mount Kanzuras. Later he colluded with Anu and the Teshub to destroy Kumarbi (The Kumarbi Cycle).

The Tigris appears twice in the Old Testament. First, in the Book of Genesis, it is the third of the four rivers branching off the river issuing out of the Garden of Eden. The second mention is in the Book of Daniel, wherein Daniel states he received one of his visions "when I was by that great river the Tigris".

The Tigris River is also mentioned in Islam in Sahih Al-Bukhari and Muslim which described the river (Euphrates) will dry up near the end time to unveil a treasure of gold and has prohibited anybody to take the gold The tomb of Imam Ahmad Bin Hanbal and Syed Abdul Razzaq Jilani is in Baghdad and the flow of Tigris restricts the number of visitors.

Baháʼu'lláh, the founder of the Baháʼí Faith, also wrote The Hidden Words around 1858 while he walked along the banks of the Tigris river during his exile in Baghdad.

The river featured on the coat of arms of Iraq from 1932 to 1959.