Jaiminīya (Talavakāra) Brāhmaṇa 2-8.297

Now these six-day rites. The Maruts indeed desired: 'May we be the strongest, mightiest, most numerous, and most full of vital power among the gods; may we conquer the heavenly world.' They saw this six-day sacrifice; they took it; they sacrificed with it. Thereupon indeed they became the strongest, mightiest, most numerous, and most full of vital power among the gods; they conquered the heavenly world. He becomes the strongest, mightiest, most numerous, and most full of vital power among his own people, and conquers the heavenly world, who knows thus. They proceed with the Pṛṣṭhya six-day rite. Prosperity, indeed, the highest summit, is the pṛṣṭhas. He mounts indeed upon prosperity, the highest summit, the pṛṣṭhas. Force, indeed, vital power, is the pṛṣṭhas. With force and vital power they proceed. The heavenly world, indeed, is the pṛṣṭhas. To the heavenly world indeed they proceed ascending. Their consecration is at the place where the Sarasvatī sinks down; they consecrate themselves on the southern bank.

The sadas hall and the havirdhāna shed have wheels; the sacrificial post has a mortar for its base, for stepping upward, for non-falling.

For if they were to sit there as if performing [ordinarily], that would be their falling down.

They proceed by the cast of a wooden peg.