Srimad Bhagavatam Canto 09, Chapter 22, Text 20

SB 9.22.20

vira-yuthagranir yena
 ramo ’pi yudhi tositah
santanor dasa-kanyayam
 jajñe citrangadah sutah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Bhismadeva was the foremost of all warriors. When he defeated Lord Parasurama in a fight, Lord Parasurama was very satisfied with him. By the semen of Santanu in the womb of Satyavati, the daughter of a fisherman, Citrangada took birth.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Satyavati was actually the daughter of Uparicara Vasu by the womb of a fisherwoman known as Matsyagarbha. Later, Satyavati was raised by a fisherman.
 
The fight between Parasurama and Bhismadeva concerns three daughters of Kasiraja — Ambika, Ambalika and Amba — who were forcibly abducted by Bhismadeva, acting on behalf of his brother Vicitravirya. Amba thought that Bhismadeva would marry her and became attached to him, but Bhismadeva refused to marry her, for he had taken the vow of brahmacarya. Amba therefore approached Bhismadeva’s military spiritual master, Parasurama, who instructed Bhisma to marry her. Bhismadeva refused, and therefore Parasurama fought with him to force him to accept the marriage. But Parasurama was defeated, and he was pleased with Bhisma.
Srimad Bhagavatam Canto 09, Chapter 22, Text 18-19
Srimad Bhagavatam Canto 09, Chapter 22, Text 21-24