Srimad Bhagavatam Canto 10, Chapter 86, Text 01

SB 10.86.1

brahman veditum icchamah
 svasaram rama-krsnayoh
yathopayeme vijayo
 ya mamasit pitamahi
King Pariksit said: O brahmana, we would like to learn how Arjuna married Lord Balarama’s and Lord Krsna’s sister, who was my grandmother.
Pariksit Maharaja turns now to the topic of the marriage of Lord Krsna’s sister, Subhadra. In the opinion of Srila Sridhara Svami, King Pariksit’s question here follows from the previous narration because Arjuna’s winning the hand of Subhadra was just as difficult a feat as Lord Krsna’s retrieving the sons of Devaki from the realm of the dead, since Lord Balarama Himself opposed Subhadra’s marriage to Arjuna.
Srimad Bhagavatam Canto 10, Chapter 86, Text 02-03