Job 32:3-6

Also against his three friends was his wrath kindled, because they had found no answer, and yet had condemned Job. Now Elihu had waited to speak unto Job, because they were elder than he. And when Elihu saw that there was no answer in the mouth of these three men, his wrath was kindled. And Elihu the son of Barachel the Buzite answered and said, I am young, and ye are very old; Wherefore I held back, and durst not show you mine opinion.