Who was the mughal ruler who took measures against the practice of Sati?

Akbar took measures to discourage and prevent the practice of Sati, though he did not completely ban it by law. He issued royal firman discouraging the practice and attempted to prevent widows from being forced into it. Jahangir also opposed Sati but Akbar's measures were more systematic. Note: Some historians note Jahangir also actively prevented sati (e.g., his own mother-in-law), but Akbar is credited with broader measures during his long reign.