Rava relates the following in the name of Rabbi Yochanan:--"Two Jewish
slaves were one day walking along, when their master, who was following,
overheard the one saying to the other, 'There is a camel ahead of us, as
I judge--for I have not seen--that is blind of one eye and laden with
two skin-bottles, one of which contains wine and the other oil, while
two drivers attend it, one of them an Israelite, and the other a
Gentile.' 'You perverse men,' said their master, 'how can you fabricate
such a story as that?' The slave answered, and gave this as his reason,
'The grass is cropped only on one side of the track, the wine, that must
have dripped, has soaked into the earth on the right, and the oil has
trickled down, and may be seen on the left; while one of the drivers
turned aside from the track to ease himself, but the other has not even
left the road for the purpose.' Upon this the master stepped on before
them in order to verify the correctness of their inferences, and found
the conclusion true in every particular. He then turned back, and ...
after complimenting the two slaves for their shrewdness, he at once gave
them their liberty."
THE TALMUD, _Sanhedrin_, fol. 104, col. 2.