SB 10.76.30
kim nu vaksye ’bhisangamya
pitarau rama-kesavau
yuddhat samyag apakrantah
prstas tatratmanah ksamam
Translation:
“What will I say to My fathers, Rama and Kesava, when I return to Them after having simply fled the battle? What can I tell Them that will befit My honor?
Purport:
Sri Pradyumna here uses the word pitarau, “fathers,” loosely. Lord Balarama was of course His uncle.