Srimad Bhagavatam Canto 10, Chapter 30, Text 26

SB 10.30.26

tais taih padais tat-padavim
 anvicchantyo ’grato ’balah
vadhvah padaih su-prktani
 vilokyartah samabruvan
 
Translation: 
 
The gopis began following Krsna’s path, as shown by His many footprints, but when they saw that these prints were thoroughly intermixed with those of His dearmost consort, they became perturbed and spoke as follows.
Srimad Bhagavatam Canto 10, Chapter 30, Text 25
Srimad Bhagavatam Canto 10, Chapter 30, Text 27