Question

What is meaning of "MY BODY SPAKE,NOT I"?

Answer 1

My body spake, not I,” meaning that it was due to his bodily exhaustion, and not because he did not wish to serve his people, that he had complained. He knelt in prayer, and fell asleep without answering the poor sick man's call.

Answer 2

The speaker meant that he had not grumbled from his heart. His body was extremely tired so he grumbled.