Sahih Muslim | Book 10 | Chapter 9

Narrated by Jabir b. Abdullah (Allah be pleased with them) is
Jabir b. Abdullah (Allah be pleased with them) is reported to have said that Allah's Messenger (may peace be upon him) forbade the sale of a heap of dates the weight of which is unknown in accordance with the known weight of dates.

Narrated by Jabir b. Abdullah
This hadith is narrated on the authority of Jabir b. Abdullah (Allah be pleased with them) but with this variation that no mention is made of the dates(which one finds) at the end of the previous hadith.