krsne dekhi' ei saba karena namaskara
krsna-gamana puche tare kariya nirdhara
krsne dekhi'-seeing Krsna; ei—these; saba—all; karena namaskara—offer respectful obeisances; krsna-gamana—the passing of Krsna; puche—inquire; tare—from them; kariya nirdhara—making certain.
"The gopis thought that because all the trees must have seen Krsna pass by they were offering respectful obeisances to Him. To be certain, the gopis inquired from the trees.
Link to this page: http://prabhupadabooks.com/cc/antya/15/50