Babur's son Kamran held his infant nephew Akbar on the walls of Kabul under fire, and Humayun had Kamran blinded

When Babur died, his eldest son Humayun took the throne at Agra on 9 Jumada I 937 AH. Nizamu-d din Ahmad records that coffers of gold were handed out, and the territories were divided among the brothers. Hindal received Mewat. The Punjab, Kabul and Kandahar were settled on Mirza Kamran. After Sher Shah drove Humayun out of India, Kamran held Kabul against him. During one siege Kamran ordered Humayun's young son, the future emperor Akbar, exposed on the battlements where the shot fell thickest. His nurse, Maham Anka, held him toward the guns, and he survived. Kamran was finally handed over by the Gakhar chief Sultan Adam. Humayun's ewer-bearer Jauhar, who was present, wrote that the emperor shared a melon with his brother. Four days later Humayun ordered him blinded rather than killed, which Wikipedia links to Babur's dying wish that his brothers not be harmed. The attendants argued over who would do it until Humayun said, "Why don't you do it yourself?" Kamran asked to be killed instead. They thrust a lancet into his eyes about fifty times and squeezed lemon juice and salt into the sockets. He was given leave to go on pilgrimage to Mecca. Kamran died there in October 1557. Akbar, the child on the walls, became emperor in 1556.