SB 10.30.3
gati-smita-preksana-bhasanadisu
priyah priyasya pratirudha-murtayah
asav aham tv ity abalas tad-atmika
nyavedisuh krsna-vihara-vibhramah
Translation:
Because the beloved gopis were absorbed in thoughts of their beloved Krsna, their bodies imitated His way of moving and smiling, His way of beholding them, His speech and His other distinctive features. Deeply immersed in thinking of Him and maddened by remembering His pastimes, they declared to one another, “I am Krsna!”
Purport:
Spontaneously, the gopis began moving like Krsna: they smiled as He would smile, glanced boldly as He would and spoke as He would. The gopis were completely absorbed in the existence of Krsna and mad with love at their sudden separation from Him, and thus their dedication to Him attained absolute perfection.