Srimad Bhagavatam Canto 04, Chapter 28, Text 57

 SB 4.28.57

pañcendriyartha arama
 dvarah prana nava prabho
tejo-’b-annani kosthani
 kulam indriya-sangrahah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
My dear friend, the five gardens are the five objects of sense enjoyment, and the protector is the life air, which passes through the nine gates. The three apartments are the chief ingredients — fire, water and earth. The six families are the aggregate total of the mind and five senses.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The five senses that acquire knowledge are sight, taste, smell, sound and touch, and these act through the nine gates — the two eyes, two ears, one mouth, two nostrils, the genitals and one rectum. These holes are compared to gates in the walls of the city. The principal ingredients are earth, water and fire, and the principal actor is the mind, which is controlled by the intelligence (buddhi).
Srimad Bhagavatam Canto 04, Chapter 28, Text 56
Srimad Bhagavatam Canto 04, Chapter 28, Text 58