SB 4.25.45
saptopari krta dvarah
puras tasyas tu dve adhah
prthag-visaya-gaty-artham
tasyam yah kascanesvarah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Of the nine gates in that city, seven were on the surface and two were subterranean. A total of nine doors were constructed, and these led to different places. All the gates were used by the city’s governor.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The seven gates of the body that are situated upward are the two eyes, two nostrils, two ears and one mouth. The two subterranean gates are the rectum and the genitals. The king, or the ruler of the body, who is the living entity, uses all these doors to enjoy different types of material pleasures. The system of opening different gates to different places is still evident in old Indian cities. Formerly a capital was surrounded by walls, and one passed through various gates to go to various cities or toward specific directions. In Old Delhi there are still remnants of surrounding walls and various gates known as the Kashmiri Gate, the Lahori Gate, etc. Similarly, in Ahmedabad there is a Delhi Gate. The point of this simile is that the living entity wants to enjoy different types of material opulences, and to this end nature has given him various holes in his body that he can utilize for sense enjoyment.