Answer by Raakhee Venugopal:
According to the Mahabharata, after Krishna leaves His mortal body, His 8 principal wives committed Sati and the other 16,000 wives were abducted by dacoits when they were being taken to Hastinapura by Arjuna. Arjuna was alone and was a broken man after Krishna left. He tried his best to rescue the women but of no avail. He was taking them to safety when the mourning procession was intercepted by the dacoits. All of Krishna’s sons perished in the civil war that led to the complete annihilation of the Yadava clan.Edit:
My response to a fellow Quora member’s comment that there is no mention in the Mahabharata of Lord Krishna being married to anybody else other than Devi Rukmini:
There are subtle mentions in the Mahabharata of Lord Krishna being married to other women besides Devi Rukmini. The detailed stories are found in other texts like the Harivamsa, Bhagavata Purana and the Srimad Bhagavatam.
“16,000 ladies had been wedded to Vasudeva.” ()
“Beholding the sight that Dwaraka presented, and seeing the numerous wives of Krishna, Arjuna wailed aloud with eyes bathed in tears and fell down on the earth. Then Satya, the daughter of Satrajit, and Rukmini too, O king, fell down beside Dhananjaya and uttered loud wails of grief.” ()
“Rukmini, the princess of Gandhara, Saivya, Haimavati, and queen Jamvabati ascended the funeral pyre. Satyabhama and other dear wives of Krishna entered the woods, O king, resolved to set themselves to the practice of penances. They began to live on fruits and roots and pass their time in the contemplation of Hari. Going beyond the Himavat, they took up their abode in a place called Kalpa.” ()