Tafseer Ibn Kathir of YAA SIIN [69]

وَمَا عَلَّمْنَاهُ الشِّعْرَ وَمَا يَنبَغِي لَهُ إِنْ هُوَ إِلَّا ذِكْرٌ وَقُرْآنٌ مُّبِينٌ

And We did not give Prophet Muhammad, knowledge of poetry, nor is it befitting for him. It is not but a message and a clear Qur'an