Kadru is her elder sister, and when they both lived with Kashyapa as his wives, and attended to all his comforts, he blessed them by granting each of them a boon.
Aruna also informed her of her source of redemption: After another 500 years, the remaining egg of hers would hatch, and a son endowed with exceptional power and prowess would be born to liberate her.
[3] After the events of the Samudra Manthana, Indra obtained a horse named Uccaihshravas from the Ocean of Milk.
When he sought an audience with Kadru, he was informed that the price of his mother's freedom was the elixir of immortality, amrita, which he would have to steal from Devaloka.
Vinata instructed Garuda to consume any Nishada he came across on his journey to the realm for his sustenance, but not to devour a single Brahmana.
Garuda succeeded in his task, and the fact that he had been able to defeat a number of celestial deities allowed him to invoke a boon from Vishnu, becoming his mount.
[5]Traditional The legend by which Garuda, and by extension, Vinata, became associated with the Suryavamsha lineage of royalty is present in the Brahmanda Purana:[6] Before the birth of Garuḍa when Kaśyapa and Vinatā were living together with their daughter Sumati the boy sage Upamanyu, son of Sutapas, went to them and told Kaśyapa thus: "While touring round the earth I worshipped the pitṛs at Gayā and I have been told that they (Pitṛs) would get redemption only in case I married and became a father.
When Garuḍa met Aurva and sought his advice about the marriage of his sister, the sage thought that the context offered a very good bride to Sagara.