The Iranian peoples or Iranic peoples are a diverse grouping of peoples who are identified by their usage of the Iranian languages and other cultural similarities.
The Bistun Inscription of Darius the Great describes itself to have been composed in Arya [language or script].
Early Indo-European migrations from the Pontic steppes and across Central Asia.
According to Allentoft (2015), the Sintashta culture probably derived from the Corded Ware culture.
Saka horseman, Pazyryk, from a carpet, c. 300 BC
The Indo-Iranian peoples, also known as Ā́rya or Aryans from their self-designation, were a group of Indo-European speaking peoples who brought the Indo-Iranian languages to major parts of Eurasia in waves from the first part of the 2nd millennium BC onwards. They eventually branched out into the Iranian peoples and Indo-Aryan peoples.
Rigveda manuscript page (1.1.1–9)
Yasna 28.1 (Bodleian MS J2)