Skambha - The Cosmic Pillar

Indra as the cosmic pillar.

On Skambha Fervour rests, the worlds and Holy Law repose on
him.
Skambha, I clearly know that all of thee is set within Indra!
On Indra Fervour rests, on him the worlds and Holy Law
recline.
Indra, I clearly know as all established in Skambha.
Be reverence paid to him, that highest Brahma, whose base is
Earth, his belly Air, who made the sky to be his head.
Homage to highest Brahma, him whose eye is Surya and the
Moon who groweth young and new again, him who made
Agni for his mouth.
Homage to highest Brahma, him whose two life-breaths were
the Wind,
The Angirasas his sight: who made the regions be his means of
sense.
Skambha set fast these two, the earth and heaven, Skambha
maintained the ample air between them.
Skambha established the six spacious regions: this whole world
Skambha entered and pervaded.
Homage to highest Brahma, him who, sprung from Fervour and
from toil,
Filled all the worlds completely, who made Soma for himself
alone!

- Atharva Veda 10.7

Skambha is the cosmic pillar of the universe. It is the predecessor for the present Shiva-Linga concept. Skambha is described as the basic foundation of the entire cosmos in the Vedic scriptures.
And Skambha, we can clearly see is explicitly identified with the almighty god of gods, Indra.
It is no surprise, considering Indra is identified again and again throughout the Vedas with the incomprehensible Brahman.