Hazrat Ali Asghar was the youngest child of Imam Husayn. He was born only a few weeks before Imam left Madina. His mother’s name was Rubaab daughter of Imra’u’l Qais who was the chief of the tribe of Kinda.
Rubaab had two children, Bibi Sakina and Ali Asghar. She and her two children accompanied Imam to Karbala’. The fact that Imam took with him a newly born baby further demonstrates the his intention was never to engage in any armed rebellion.