This part is taken from Various Stories & Tales in “Spiritual Stories” as Told by Ramana Maharshi
Nakkirar was doing tapas on the bank of a tirtha. A leaf fell down from the tree; half the leaf touched the water and the other half touched the ground. Suddenly the water- half became a fish and the land-half became a bird. Each of them was united to the other by the leaf and struggled to go into its own element. Nakkirar was watching it in wonder and suddenly a spirit came down from above and carried him away to a cave where there were already 999 captives, all of whom were tapo bhrashtas.
Devotee: “Was Nakkirar a tapo bhrashta?”
Bhagavan: “Yes. While engaged in contemplation, why did he fall from contemplation and take to watching the mysterious happening in front of him? Nakkirar composed Tirumurukatruppadai and obtained the release of all the thousand prisoners.”