SB 10.38.26
tad-darsanahlada-vivrddha-sambhramah
premnordhva-romasru-kalakuleksanah
rathad avaskandya sa tesv acestata
prabhor amuny anghri-rajamsy aho iti
Translation:
Increasingly agitated by ecstasy at seeing the Lord’s footprints, his bodily hairs standing on end because of his pure love, and his eyes filled with tears, Akrura jumped down from his chariot and began rolling about among those footprints, exclaiming, “Ah, this is the dust from my master’s feet!”