Mahabharata
Why Pandu married twice?
What was the reason for Pandu's second marriage?
What was the reason for Pandu's second marriage?
Pandu got married the first time because it was an expectation after he became king. His second marriage came about as a result of an alliance, he married Madri to avoid war. Pandu's first wife's name was Kunti. Note, polygamy was an accepted practice.
Mahabharata