Shantanu's Tragic Pact with Ganga

The woman smiled and said, "I will marry you on two conditions."

"I am ready to fulfill any of your conditions." 

"My first condition is that you will never interfere in anything I do and never question me. My second condition is that you will never address me in harsh words, no matter what I do. If you violate these conditions, I will leave you then and there."

Shantanu was madly in love with the woman and agreed to her stipulations without thinking. She was none other than the goddess Ganga in human form!

Shantanu and Ganga got married and lived together for two years. They enjoyed their time together as a married couple. When Ganga became pregnant, Shantanu was overjoyed. His happiness grew when their son was born. However, Ganga took the newborn to the riverbank and drowned him. Shantanu, who had secretly followed Ganga, couldn't believe what he saw. He recalled Ganga's warnings and chose to remain silent.

Similarly, Ganga bore six more sons and drowned each of them in the river, leaving Shantanu feeling helpless to do anything but watch. Ganga showed no sign of remorse on her face as seven of their children had drowned in the river. Sometime later, Ganga gave birth to her eighth son and headed to the riverbank with him, closely followed by Shantanu. This time, he couldn't stop himself. Just as Ganga was about to drown her eighth child, Shantanu yelled, "Stop! Who are you? Why are you killing your own children? Have mercy on this child, at least. Are you a woman or a demoness who takes the lives of her own children?"

Ganga placed the boy in her lap and turned toward Shantanu. "You have broken your promise," she said. "So, I must leave you. However, I will reveal my identity to you before I leave. I am Ganga, the daughter of Rishi Jahnu. I was born from Lord Shiv's matted hair. On this earth, I chose you as my husband and the father of my children. I will now tell you why I killed my own children.

"Eight Vasus stole Rishi Vasishtha's cow, and as a result, the rishi cursed them to be born as humans on Earth. The Vasus asked me to be their mother on Earth and ensure they did not suffer. I agreed and freed seven of them from mortal life. Now, I will not kill my eighth child; he is destined to live in this world. This extraordinary boy, who will be as powerful as a Vasu, is named 'Devavrata' and will also be known as 'Gangeya' because he is my son. He will stay with me until he masters all skills, and then I will return him to you."