dhanyā aho amī ālyo
govindāńghry-abja-reṇavaḥ
yān brahmeśau ramā devī
dadhur mūrdhny agha-nuttaye
dhanyah -- sanctified; aho -- ah; ami -- these; alyah -- O gopis; govinda -- of Govinda; anghri-abja -- of the lotuslike feet; renavah -- the particles of dust; yan -- which; brahma -- Lord Brahma; isau -- and Lord Siva; rama devi -- Ramadevi, the wife of Lord Vishnu; dadhuh -- take; murdhni -- on their heads; agha -- of their sinful reactions; nuttaye -- for the dispelling.
According to Srila Visvanatha Cakravarti, who quotes from sastra, each day in the late afternoon, as Krishna returned from the cow pastures with His cowherd boyfriends, great demigods like Brahma and Siva would come down from heaven and take the dust of His feet.
Great personalities like the goddess Rama (the wife of Vishnu), Siva and Brahma are not at all sinful. But in the ecstasy of pure Krishna consciousness they feel themselves fallen and impure. Thus, desiring to purify themselves, they blissfully take the dust of the Lord's lotus feet on their heads.