Inside a list of Indra's deeds the poet tells of a morning when Ushas, daughter of the Sky, raised herself in pride and meant harm. Indra struck her and shattered her cart. She fled in fear from the ruined cart, which lay broken in pieces in the river Vipash, and she ran far away. The poet counts it a heroic deed and moves on to the next.
Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 4.30.8-11
In a hymn whose refrain is that Indra did these things in the rapture of Soma, he crushes the cart of Ushas with his thunderbolt and tears through her slow team with his own swift horses.
Names the thunderbolt and contrasts her slow animals with his fast ones; no pride, no river, no flight.
Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 2.15.6
The Sun has unyoked his car in mid-heaven and Indra whets his weapons against a demon. Bright Ushas is afraid of Indra's bolt; she goes on her way and leaves her cart there.
No blow is described: she is frightened, abandons the cart and walks on.
Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 10.138.3-5
A poet uses the event as a comparison: Indra's enemies fall as when he struck down the cart of Ushas. A hymn to Dawn warns her not to delay, in case the Sun scorches her like a thief.
The story is only alluded to; 5.79.9 is a separate warning about a lingering dawn, used by Bergaigne's reading.
Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 10.73.6; Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 5.79.9
Macdonell reports that the myth is usually explained as a thunderstorm obscuring the dawn, and that Bergaigne instead saw the sunrise, as Indra's victory, overcoming a delaying dawn.
Interpretation, not narrative.
Vedic Mythology, A. A. Macdonell (1897) § section-22
Sources: Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer; Vedic Mythology, A. A. Macdonell (1897)
Prajapati gives his daughter Surya Savitri to King Soma; all the gods come as groomsmen.
Surya, daughter of the Sun, is given to Soma with the Ashvins as groomsmen; the Rigveda's wedding hymn, and the Brahmana's race for the wedding recitation.
Before sunrise Night gives up her place to Dawn.
The dawns raise their banner in the east and come on like the mother cows, bright red.
Night approaches, looking out with all her eyes, wearing all her glories.
Harishchandra promises Varuna the son he asks for and keeps putting off the sacrifice; the prince flees, the king swells with disease, and the bought boy Shunahshepa praises the gods from the post until his bonds fall.
Trita kills the three-headed son of Tvashtri; evil dreams and guilt are sent off to him; the Brahmana explains why.
Brahma kills the demon Vajranabha with his lotus-weapon.