Ahmad ibn Muhammad ibn Isa narrated from Musa ibn al-Qasim al-Bajali from Ali ibn Ja’far from his brother Musa ibn Ja’far, peace be upon them both. He said: I asked Imam al-Kadhim عليه السلام about a child, Should the prayer (Salat Al Mayyit) be performed over him if he dies and he is five years old? Imam عليه السلام said: “If he comprehends the prayer, then the prayer is performed over him.”