It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The best of the believers is a man who is lenient and easy in buying and selling, generous in repaying a debt, and lenient also in asking for his own debt to be repaid."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu al-Ala' (that is, Yazid bin Abdullah bin al-Shikhkhir (may Allah have mercy on him)) except Abdullah bin Abdullah al-Hadadi (may Allah have mercy on him), and al-Shadhakuni is alone in narrating it."
(It is mentioned in the chain that Abdullah bin Abdullah al-Hadadi was thiqah (trustworthy).)