Here are three quotes in the Vedic Samhitas:
ब्रा॒ह्म॒णो॑ऽस्य॒ मुख॑मासीद्बा॒हू रा॑ज॒न्यः॑ कृ॒तः ।
ऊ॒रू तद॑स्य॒ यद्वैश्यः॑ प॒द्भ्यां शू॒द्रो अ॑जायत ॥ १०.०९०.१२
The Brahman was his mouth, of both his arms was the Rajanya made. His
thighs became the Vaisya, from his feet the Sudras was produced. ~Rig Veda 10.90.12 translated by R. Griffiths
Yajur Veda 26.2 translated by Devi Chand:
I do hereby address this salutary speech for the benefit of humanity,
for the Brahmanas, the Kshatriyas, the Sudras, the Vaishas, the
kinfolk and the men of the lowest position in society.
Yajur Veda 18.48 translated by Devi Chand:
O God grant love to our holy priests, set love in our ruling chiefs.
Grant love to the Vaishyas and Shudras; give out of Thy unbounded
store of love, love unto me!
Let me add that the caste system as seen in certain Smritis is not seen in the Vedic Samhitas.
If then with all the documents before us, we ask the question, does
caste as we find it in Manu and at the present day, form part of the
most ancient religious teaching of the Vedas? We can answer with a
decided No. ~Max Mueller in Chips from a German Work-shop