Curse of Vinata - Continued

When the two sisters saw the horse, it was evening. Kadaru asked her sister, can you guess the color of the horse? Vinata said it is white. Kadaru said no, it is black.
They kept arguing amongst themselves. Then Kadaru said one who lost the wager would serve as the slave of the other sister. Vinata agreed.
Kadaru in the dead of the night called her sons and told them what had happened. The nagas said it was not fair. All knew the horse was white. And Vinata was also like a mother to them and it would not be fair to deceive her.
Kadaru seeing her sons refuse cursed them to get destroyed in the snake sacrifice of Janamjeya.
The snakes then went to the horse and slowly crept over it so from a distance it looked that the horse was dark in color. Seeing the color of the horse, Vinata was forced to be the slave of Kadaru.

Vinata cursed

The sages listening to the tale from Sauti wanted to know more. Sauti continued.
Prajapati Daksha had two beautiful daughters - Kadaru and Vinata. He got them married to Rishi Kashyapa.
The two wives used to serve their husband dutify. One day, pleased, Kashyapa asked them to ask for a boon. Kadaru said she wanted thousand Nagas as her sons. Vinata said she wanted two sons, who would be greater in strength than the combined strength of Kadaru's sons.
In time, the two wives became heavy with child.
Once when Kashyapa was away, the two wives gave birth. Kadaru had a thousand eggs and Vinata had two eggs.
They careful kept the eggs in safe place to hatch. In time, Kadaru's eggs hatched and a thousand snakes were born from that.
Vinata was hurt. She and her sister had given birth at the same time, so why did her eggs not hatch. Not able to control herself, she went and broke one of the eggs. From that egg emerged a child who skin color was like copper. The child was only half formed. Angry at being brought forth before time, the child cursed his mother. You were not patient and could not control yourself. I curse you. You were jealous seeing your sister's sons born before yours, and now you will have to serve as a slave to that same sister. You have one egg left. Do not touch that. One who will be born from that will be responsible for lifting your curse.
Dejected Vinata left.

One day Kadaru and Vinata were sitting when they saw Uchchaihshravas passing by. Uchchaihshravas was a wonderful looking horse. Decked in gems, it had a regal gait. This horse was born, when the cosmic ocean was churned.