CC Madhya 24.222
‘rāmaś ca kṛṣṇaś ca’ yathā viharaye vane
“The word ‘nirgranthāḥ’ can be used as an adjective, and ‘api’ can be used in the sense of certainty. For instance, rāmaś ca kṛṣṇaś ca means that both Rāma and Kṛṣṇa enjoy walking in the forest.
Because it is said that both Rāma and Kṛṣṇa enjoy wandering in the forest, it is understood that both of Them are enjoying Their tour within the forest.