Kadru wins the wager and enslaves Vinata
Kadru and Vinata go to see the divine horse Uchchaihshravas, whose tail colour was the subject of their fateful bet. Kadru points to the black hairs she secretly placed there, proving her claim and winning the wager.
The wager was simple: was the tail of the divine, milk-white horse Uchchaihshravas entirely white, or was it black? Kadru had bet on black. Vinata had bet on white. The loser would become the winner's slave.
Having crossed the ocean, Kadru — moving with swift speed — arrived at the place of the horse, accompanied by Vinata. They stood before Uchchaihshravas to inspect its tail.
Kadru looked. Then she pointed.
There, stuck to the tail, were many black hairs.
Kadru had commanded her serpent sons to coil themselves around the tail to make it appear black. Some refused, and she cursed them to die in Janamejaya's snake sacrifice. The obedient ones went. Now their bodies, or the illusion they created, served as the evidence Kadru needed.
She pointed to the black hairs and claimed her victory. With that gesture, she made the dejected Vinata her slave.
Vinata had lost. The terms were absolute. She became a slave, stricken by grief, bound in servitude to her own sister.