Tzadikim are infallible

 Yevamos (99b) R. Eleazar b. Zadok said, ‘During the whole of my lifetime I have given evidence but once, and through my statement they raised a slave to the priesthood’. ‘They raised’? Is such an error conceivable! If through the beasts of the righteous the Holy One does not cause an offence to be committed, how much less through the righteous themselves! — Rather, read. ‘They desired to raise a slave to the priesthood, through my statement’. He witnessed the occurrence in the place of R. Jose. but went and tendered his evidence in the place of R. Judah.