וַיֹּ֥סֶף אֱלִיה֗וּא וַיֹּאמַֽר׃
און אליהוא האָט װײַטער געזאָגט:
Rashi
Then Elihu continued I saw in the reasons of Rabbi Moshe Hadarshan (the preacher), that he delivered three addresses corresponding to Job’s three companions, and this is the fourth one. Therefore it is called an addition.