Answer
The answer is the rebellion led by his son. Emperor Jahangir ascended to the throne after the death of his father, Emperor Akbar. However, Jahangir's son, Prince Khurram, later known as Shah Jahan, rebelled against him. The rebellion was driven by Khurram's ambition to succeed his father as the emperor. Jahangir eventually fell ill and passed away during the conflict, leaving the throne to Shah Jahan.