Mbh 1.102.2a

“Vaisampayana said, ‘O thou of Kuru’s race, after Chitrangada was slain, his successor Vichitravirya being a minor, Bhishma ruled the kingdom, placing himself under the command of Satyavati. When he saw that his brother, who was the foremost of intelligent men, attained to majority, Bhishma set his heart upon marrying Vichitravirya. At this time he heard that the three daughters of the king of Kasi, all equal in beauty to the Apsaras themselves, would be married on the same occasion, selecting their husbands at a self-choice ceremony. Then that foremost of car-warriors, that vanquisher of all foes, at the command of his mother, went to the city of Varanasi in a single chariot. There Bhishma, the son of Santanu, saw that innumerable monarchs had come from all directions; and there he also saw those three maidens that would select their own husbands. And when the (assembled) kings were each being mentioned by name, Bhishma chose those maidens (on behalf of his brother). And taking them upon his chariot, Bhishma, that first of smiters in battle, addressed the kings, O monarch, and said in a voice deep as the roar of the clouds, ‘The wise have directed that when an accomplished person has been invited, a maiden may be bestowed on him, decked with ornaments and along with many valuable presents. Others again may bestow their daughters by accepting a couple of kine. Some again bestow their daughters by taking a fixed sum, and some take away maidens by force. Some wed with the consent of the maidens, some by drugging them into consent, and some by going unto the maidens’ parents and obtaining their sanction. Some again obtain wives as presents for assisting at sacrifices. Of these, the learned always applaud the eighth form of marriage. Kings, however, speak highly of the Swyamvara (the fifth form as above) and themselves wed according to it.