“According to the Vedic version, there is a hellish planet called Put, and one who delivers a person from there is called putra. The purpose of marriage, therefore, is to have a putra, or son who is able to deliver his father, even if the father falls down to the hellish condition of put.” (Shrila Prabhupada, Shrimad Bhagavatam, 4.21.46 Purport)