Passage: The Hindu epic, Mahabharata, tells that the Vasus, cursed by Vashishta, had requested Ganga to be their mother. Ganga incarnated and became the wife of King Shantanu on condition that at no stage shall he question her actions or she would leave him. As seven Vasus were born as their children, one after the other, Ganga drowned them in her own waters, freeing them from their punishment and the king made no opposition. Only when the eighth was born did the king finally oppose his wife, who therefore left him. So the eighth son, Dyaus incarnated, remained alive, imprisoned in mortal form and later became known in his mortal incarnation as Bhishma (Devavrata), who is one of the most respected characters of Mahabharata.

Question: What is the one condition Ganga proposed?
no stage shall he question her actions or she would leave him