SB 3.20.21
devas tan aha samvigno
ma mam jaksata raksata
aho me yaksa-raksamsi
praja yuyam babhuvitha
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Brahma, the head of the demigods, full of anxiety, asked them, “Do not eat me, but protect me. You are born from me and have become my sons. Therefore you are Yaksas and Raksasas.”
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The demons who were born from the body of Brahma were called Yaksas and Raksasas because some of them cried that Brahma should be eaten and the others cried that he should not be protected. The ones who said that he should be eaten were called Yaksas, and the ones who said that he should not be protected became Raksasas, man-eaters. The two, Yaksas and Raksasas, are the original creation by Brahma and are represented even until today in the uncivilized men who are scattered all over the universe. They are born of the mode of ignorance, and therefore, because of their behavior, they are called Raksasas, or man-eaters.