Reference for Bava Batra 170:10

אמר רבא ת"ש משך חמריו ופועליו והכניסן לתוך ביתו בין פסק עד שלא מדד ובין מדד עד שלא פסק שניהן יכולין לחזור בהן

labourers and has [thus] brought them into his house [while the loads<span class="x" onmousemove="('comment',' Loads of, e.g., produce. ');">²⁴</span> remained on their backs], whether the price was fixed before the measuring, or the measuring took place before the price was fixed, both<span class="x" onmousemove="('comment',' Buyer and seller. ');">²⁵</span> may withdraw from the sale.<span class="x" onmousemove="('comment',' Two conditions are required: Fixing the price and measuring out into the buyer's vessels. Fixing the price alone while the produce is still on the men's or asses' backs is of no avail, because this cannot take the place of meshikah nor that of the 'buyer's territory'. The 'pulling' of the men who carry the produce does not take the place of the 'pulling' of the produce itself. Measuring out into the buyer's vessel or territory, or even actual meshikah, is of no avail before the price has been agreed upon, because, before that has been done, neither seller nor buyer agree definitely to the sale or purchase. V. n. 10. ');">²⁶</span>

Explore reference for Bava Batra 170:10. In-depth commentary and analysis from classical Jewish sources.