الِاقْتِبَاسُ — التَّضْمِينُ
Quotation from Qur’an or Hadith versus incorporating verse.
When a composition incorporates Qur’anic or Prophetic wording, the relevant discussion is iqtibās. When it incorporates another poet’s line or part of one, taḍmīn is the more relevant category, with due attention to attribution where required.
Both appear as an earlier textual fragment embedded in a later composition. Their classification depends on the source, mode of incorporation, and attribution, not the vague observation that something was borrowed.