Not trusting wiki because its an edited opinion, while may other sources disagree.
https://www.learnreligions.com/what-are-vedas-1769572
The Rig Veda: The Book of Mantra
The Rig Veda is a collection of inspired songs or hymns and is a main source of information on the Rig Vedic civilization. It is the oldest book in any Indo-European language and contains the earliest form of all Sanskrit mantras, dating back to 1500 BCE- 1000 BCE. Some scholars date the Rig Veda as early as 12000 BCE - 4000 BCE.