>>17778583
In the RigVeda, they and the Dasyu are described as:

>amánuṣa (अमानुष, “non-sons of Manu/humans”),
>ajabām (अजभाम्, “armless”)
>bahvṛkáṇa (बहुवृकण, “noseless”)
>ahi (अहि, “serpents”)
>víṣa (विष, “poisonous”)
>kṛṣṇá tvác (कृष्ण त्वच्, “dark ones”)
>gopati/gómant (गोपति / गोमन्त्, “lords of cattle”)
>śúbra-śīrṣa (शुभ्र-शीर्ष, “adorned/shining head”)
>dṛḷhá pur (दृढ पुर्, “with solid fortresses”)
>śatáhimá/śatám aghám (शतहिमा / शतम् अघम्, “possessors of a hundred riches”)
>śatá-vā́jaḥ (शत-वाद्, “possessors of many goods/food”)
>ániḍ (अनिड्, “voiceless/mantra”)
>abrahmá (अब्रह्मा, “without Brahmin”)
>ayajvānaḥ (अयज्वानः, “non-ritual sacrificers”)
>asatyá (असत्य, “false”)
>anṛtá (अनृत, “against the ṛta”)
>śíśna-devāḥ (शिश्न-देवाः, “phallic worshippers”),
>mṛdhá (मृध, “hostiles”)
>māyávīn / māyinaḥ (मायाविन्, “masters of magic/illusion”)

Studying Proto-Indo-European (PIE) mythology and reading the RigVeda it becomes clear that the Dasa refers to the *Deh2nu. In several Indo-European myths the river/water deities *deh2nu-s or *dhonu-s are opposed to the gods or heroes, related to *h2ner(t)-'virile strength, man. These who serve the chaos monster/dragon/serpent in the Proto-Indo-European myth, NgWhi, whose name means “Negation” and is said to always be represented as having a quality of multiplicity, lives on a mountain/hill (fortress) as opposed to the steppes, stealing cattle and controlling the distribution of water.