Vaishnava Samhita. Ganga Yamuna Charitam. Vol II Book VI Chp 4 Shloka 28

महात्मा हरिवंशोपि पुत्रीभावेन सम्युतः 
लालयामास ते कन्ये विषुद्धप्रेमतत्परः  ||

Mahatma Harivamsha who was endowed with blemishless affection for them, considered them to be his own daughters and brought them up with care.