[He said:] There are narrations on this topic from Jabir and Abu Hurairah.
[Abu 'Eisa said:] The Hadith of Suwaid is a Hasan Sahih Hadith. The people of knowledge consider it recommended to add more when weighing.
Shu'bah reported this Hadith from Simak, so he said: "From Abu Safwan" and he mentioned the narration.
In-book : Book 14, Hadith 108
English translation : Vol. 1, Book 12, Hadith 1305