SB 10.15.5
sri-bhagavan uvaca
aho ami deva-varamararcitam
padambujam te sumanah-phalarhanam
namanty upadaya sikhabhir atmanas
tamo-’pahatyai taru-janma yat-krtam
Translation:
The Supreme Personality of Godhead said: O greatest of Lords, just see how these trees are bowing their heads at Your lotus feet, which are worshipable by the immortal demigods. The trees are offering You their fruits and flowers to eradicate the dark ignorance that has caused their birth as trees.
Purport:
The trees of Vrndavana were thinking that because of past offenses they had now taken birth as trees and, being immovable, could not accompany Lord Krsna in His wanderings throughout the Vrndavana area. In fact, all the creatures of Vrndavana, including the trees and cows, were great souls who could personally associate with the Supreme Personality of Godhead. But because of ecstatic sentiments of separation, the trees considered themselves in ignorance and thus tried to purify themselves by bowing down at the lotus feet of Krsna and Balarama. Lord Krsna understanding their mentality, simultaneously glanced at them with affection and praised their devotional service before His older brother, Balarama.