It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "There is no good in trade except for the one who does not praise (his goods with exaggeration) when selling, nor disparage what he has bought, who earns in a lawful way and spends it on its due rights (obligations), and who keeps the swearing of oaths away from (the whole dealing)."
No one narrated this hadith from Yahya bin Abi Kathir (may Allah have mercy on him) except Umar bin Rashid (may Allah have mercy on him), and Abu Ahmad al-Zubayri (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب العين / 4787
Hadith Gradingمحدثین:إسناده ضعيف لضعف عمر بن راشد
Hadith Takhrij«قال الهيثمي: وفيه عمر بن راشد وثقه العجلي وضعفه الجمهور «مجمع الزوائد ومنبع الفوائد، ج 4، ص 73»»