It is narrated from Abdullah ibn Muhammad Al-Hajjal from Thaʿlabah ibn Maymun from Muhammad ibn Qays, who said: I asked Abu Jafar Imam Muhammad ibn Ali Al-Baqir عليه السلام about a man who gives preference to some of his children over others. Imam عليه السلام replied: "Yes, and he may also favor some of his wives (over other wives)."