The Semnones recount themselves to be the most ancient and most noble.
The belief of their antiquity is confirmed by religious mysteries.
At a stated time of the year, all the several people descended from the same stock, assemble by their deputies in a wood; consecrated by the idolatries of their forefathers, and by superstitious awe in times of old.

There by publicly sacrificing a man, they begin the horrible solemnity of their barbarous worship.

To this grove another sort of reverence is also paid.
No one enters it otherwise than bound with ligatures, thence professing his subordination and meanness, and the power of the Deity there. If he fall down, he is not permitted to rise or be raised, but grovels along upon the ground. And of all their superstition, this is the drift and tendency; that from this place the nation drew their original, that here God, the supreme Governor of the world, resides, and that all things else whatsoever are subject to him and bound to obey him.

The potent condition of the Semnones has increased their influence and authority, as they inhabit an hundred towns; and from the largeness of their community it comes, that they hold themselves for the head of the Suevians.

Tacitus