What is “aḍāʿūnī wa-ayyi fatan aḍāʿū” in the later poem?

Iqtibās and Taḍmīn: Quoting Scripture and Incorporating Poetry

• A hemistich incorporated from a famous earlier poem
• An exact segment of Qur’an 14:37
• Only an idea borrowed without any earlier words
• A short portion of a Hadith chain