Bava Batra

Come and hear: IF ONE HAS SOLD FRUIT TO ANOTHER [AND THE BUYER] HAS PULLED [THEM]. THOUGH THEY HAVE NOT [YET] BEEN MEASURED, OWNERSHIP IS ACQUIRED. Surely fruit can be lifted up, and yet it is taught that ownership [of it] is acquired by meshikah?  Here  we are dealing with [fruit packed in] large bags.  If so,  [how can you] explain the last clause [which reads]. IF ONE BUYS FLAX FROM ANOTHER. HE DOES NOT ACQUIRE OWNERSHIP UNTIL HE MOVES IT FROM ONE PLACE TO ANOTHER. Is not flax [also] packed in large bags?  — Flax is different — [It has to be packed in small bags] because, [otherwise]. it slips out. Rabina said to R. Ashi, Come and hear: Large cattle are acquired by mesirah,  and small by lifting these are the words of R. Meir and R. Simeon b. Eleazar. But the Sages say: Small cattle [are acquired] by meshikah.  Surely, [it may be asked], small cattle can be lifted and yet it is taught  that ownership of them may be acquired by meshikah! — Cattle are different because they clutch the ground. Both Rab and Samuel said: [If the seller said], 'I sell you a kor  for thirty', he may withdraw even at the last  se'ah.  [If, however, he said]: 'I sell you a kor for thirty, [each] se'ah for a sela', [the buyer] acquires possession of every se'ah  as it is measured out for him. Come and hear: If the measure was the property of one of them, he [whose measure it is] acquires successive possession of every single unit of the quantity as soon as it is put in.  [Surely this law applies] even to [the case] where the measure had not been filled!  — [This law refers only to such a case] as when [the seller] said to [the buyer], '[I sell you] a hin  for twelve sela'im, [every] log  for a sela'. And, as R. Kahana said,  'there were marks in the hin [of the Temple].  so, in this case also, there were marks on the measures. Come and hear! [It has been taught: In the case where a man] hired a labourer to work for him at the harvesting season for a denarius a day. [and paid him his wage in advance].