Shabbat

and the Rabbis ascertained that five [species sown] in six [handbreadths square] do not draw [sustenance] from each other.  And how do we know that that which the Rabbis ascertain is of consequence?  For R. Hiyya b. Abba said in R. Johanan's name: What is meant by, Thou shalt not remove thy neighbour's landmark, which they of old have set?  The landmark which they of old have set thou shalt not encroach upon.  What landmarks did they of old set? R. Samuel b. Nahmani said in R. Johanan's name, [Even] as it is written, These are the sons of Seir the Horite, the inhabitants of the earth:  are then the whole world inhabitants of heaven? But it means that they were thoroughly versed in the cultivation of the earth. For they used to say, This complete [measuring] rod [of land is fit] for olives, this complete [measuring] rod [is fit] for vines, this complete [measuring] rod for figs.  And Horite [hori] implies that they smelled [merikin] the earth. And Hivite [hiwi]? Said R. Papa: [It teaches] that they tasted the earth like a serpent [hiwya].  R. Aha b. Jacob said: Horite [hori] implies that they become free [horin] from [the cares of] their property. R. Assi said: The internal area of the seed-bed must be six [handbreadths square], apart from its borders.  It was taught likewise: The internal area of the seed-bed must be six [handbreadths square]. How much must its borders be?  — As we learnt, R. Judah said: Its breadth must be the full breadth of [the sole of] a foot, R. Zera — others say, R. Hanina b. Papa — said: What is R. Judah's reason? Because it is written, and wateredst it with thy foot:  just as the [sole of] the foot is a handbreadth, so must the border too be a handbreadth. Rab said: We learnt of a seed bed in a waste plot.  But there is the corner space?  — The School of Rab  answered in Rab's name: It refers to one who fills up the corners. Yet let one sow on the outside,  and not fill up the inside?