Sa'd, the freed slave of Sayyiduna Abu Bakr (may Allah be pleased with him), said: A man complained to the Prophet (peace and blessings be upon him) about Sayyiduna Safwan bin al-Mu'attal (may Allah be pleased with him) (he, Safwan, used to compose this poetry). He said: "O Messenger of Allah, Safwan has satirised me." He (peace and blessings be upon him) said: "Leave Safwan alone, for Safwan is rough of tongue but good of heart."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5474