Vayikra Rabbah 30:14

Rabbi  PERSONS NAME opened, "'All of my  PLURAL NOUN shall say, "Lord, who is like you"' (Psalms 35:10). This  NOUN was only stated for the sake of the  NOUN. The palm branch is similar to the  BODY PART of man. And the myrtle is similar to the  BODY PART. And the willow is similar to the  BODY PART. And the etrog (citron), is similar to the  BODY PART. David said, 'In all of the limbs, there are no greater ones than these, as they are compared to the entire  NOUN.' This is what is meant by 'All of my bones shall say.'"