Riferimento su Sanhedrin 3:12

They said three things before Rabbi Akiva, two in the name of Rabbi Eliezer and one in the name of Rabbi Joshua. Two in the name of Rabbi Eliezer:A woman may go out [on the Sabbath adorned] with a “golden-city”; And they that fly pigeons are unfit to bear evidence. And one in the name of Rabbi Joshua: If there was a creeping thing in the mouth of a weasel when it walked over loaves of terumah, and it is doubtful whether it touched them or whether it did not touch them, that about which there is doubt remains pure.