They provide him sages from among the sages of the court who read to him about the service of the day. Then they say to him, “My lord Kohen Gadol, read with your own mouth, perhaps you have forgotten or perhaps you have not learned.”  On the morning of the Eve of Yom Kippur they stand him at the Eastern Gate and they lead before him oxen, rams, and sheep, that he should recognize [them] and be conversant in the service.