The faultness Draupadi is the common wife of all the sons of Pandu. Having first lost himself, the Pandava (Yudhisthira) offered her as a stake.
साधारणी च सर्वेषां पाण्डवानामनिन्दिता। जितेन पूर्वं चानेन पाण्डवेन कृतः पणः॥