Question: What austerities were done by Yasoda to obtain Krishna as her son? Why is Subhadra worshipped with Krishna and Balarama?
Answer by Romapada Swami: Mother Yasoda is actually an eternal associate of Krishna, She is eternally Krishna’s mother. However, in terms of lila or pastimes, it is described that Yasoda and Nanda, in their previous lives, underwent great austerities as Sutapa and Prsni. The 10th Canto of SB refers to Subhadra Devi as the daughter of Vasudeva and Devaki, thus she is the sister of Krishna and Balarama. She represents the internal potency of Krishna.