Reference for Bava Batra 185:1

מאי טעמא לאו משום דרובא הכי איתנהו

is not [the sale valid] because most [slaves] are [of] such [a character]? [And does not this prove that even in monetary matters,<span class="x" onmousemove="('comment',' Such e.g.. as the purchase of slaves. ');">¹</span> one is to be guided by the majority rule?]<span class="x" onmousemove="('comment',' How, then, could Samuel say that the majority rule is applicable to ritual matters only? ');">²</span>

Jastrow