SB 2.10.27
utsisrksor dhatu-malam
nirabhidyata vai gudam
tatah payus tato mitra
utsarga ubhayasrayah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Thereafter, when He desired to evacuate the refuse of eatables, the evacuating hole, anus, and the sensory organ thereof developed along with the controlling deity Mitra. The sensory organ and the evacuating substance are both under the shelter of the controlling deity.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Even in the matter of evacuating stool, the refuse is controlled, so how can the living entity claim to be independent?