SB 2.1.35
vijñana-saktim mahim amananti
sarvatmano ’ntah-karanam giritram
asvasvatary-ustra-gaja nakhani
sarve mrgah pasavah sroni-dese
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The principle of matter [mahat-tattva] is the consciousness of the omnipresent Lord, as asserted by the experts, and Rudradeva is His ego. The horse, mule, camel and elephant are His nails, and wild animals and all quadrupeds are situated in the belt zone of the Lord.