Bhagavatapurana 10.2.13

10.2.13

garbha-saṅkarṣaṇāt taṃ vai prāhuḥ saṅkarṣaṇaṃ bhuvi /
rāmeti loka-ramaṇād balabhadraṃ balocchrayāt //

13. “From the circumstance of having been removed from the womb (of Devaki) he is called Sankarshana in the world. He is also known as Rama on account of His giving delight to the world, and as Bala on account of His great strength”.