Arjuna had another wife Subhadrā. That Subhadrā, you know, sister of Kṛṣṇa. Sister of Kṛṣṇa. So Subhadrā, Balarāma, elder brother, Kṛṣṇa, younger brother. Kṛṣṇa wanted to hand over Subhadrā to Arjuna, and Balarāma wanted to hand over Subhadrā to Duryodhana. So Kṛṣṇa could not say anything. The elder brother has decided. Therefore Kṛṣṇa advised Arjuna to kidnap Subhadrā. Just see how much Kṛṣṇa was affectionate to Arjuna that Arjuna liked also to marry Subhadrā, and Subhadrā also liked, but the elder brother did not agree. So they made a plan that Arjuna kidnap Subhadrā.
This kidnapping was allowed among the kṣatriyas, and fight. That is kṣatriya marriage. Unless there is fight, that marriage is not complete. The red vermillion which we apply, that is kṣatriya principle. After killing the opposite party, the blood will be smeared over the hair of the bride. That is conquer, victory. So in every marriage, Kṛṣṇa had 16,108 wives, and each wife was married by fighting, beginning from Rukmiṇī. Rukmiṇī also, the first wife of Kṛṣṇa, the first queen, when Kṛṣṇa became king of Dvārakā, she was the first queen. So Subhadra was kidnapped by Arjuna. Rukmiṇī was settled up to be married with Śiśupāla. Śiśupāla also happened to be Kṛṣṇa's cousin-brother, and Rukmiṇī did not like that she would be handed over to Śiśupāla. She wanted to marry Kṛṣṇa. So she sent one letter to Kṛṣṇa that this is the position. "My brother Rukma, he has decided to hand over to me to Śiśupāla, but I don't like. So please arrange for kidnapping." A brāhmaṇa was sent to Kṛṣṇa.