SB 5.25.2
yasyedam ksiti-mandalam bhagavato ’nanta-murteh sahasra-sirasa ekasminn eva sirsani dhriyamanam
siddhartha iva laksyate.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Sukadeva Gosvami continued: This great universe, situated on one of Lord Anantadeva’s thousands of hoods, appears just like a white mustard seed. It is infinitesimal compared to the hood of Lord Ananta.