Commentary for Bava Batra 63:1

ורשב"ג סבר ערער תרי והאמר רבי יוחנן דברי הכל אין ערער פחות משנים

that there must be two, then what of the statement of R. Johanan who said that according to all authorities no objection is valid unless it is raised by two challengers? We suppose therefore that the objection has been raised by two; and here we are dealing with a case where the father of this man is known to have been a priest, but a report has been spread that his mother was a divorced woman<span class="x" onmousemove="('comment',' And therefore he was disqualified, on the basis of Lev. XXI, 7. ');">¹</span>

Rashbam on Bava Batra