Adi Parva - Volume 1
Taan Draupadii pratyuvaacha
tatraiva gachchha Kaunteeya
yatra saa Saatvataatmajaa
Tathaa bahuvidhaan Krishn`aan
Arjuna took newly wed Subhadra to his city (Hastina) and showed her to his first wife Draupadi.
(Draupadi was said to be very bold and courageous.) But she wept on seeing Subhadra, the second wife. Arjuna persuaded her to accept Subhadra.
*Arjuna did not find it necessary to tell Draupadi in advance before bringing a second wife.