«وأما التضمين فهو أن يضمن الشعر شيئا من شعر الغير مع التنبيه عليه إن لم يكن مشهورا عند البلغاء»
Taḍmīn is to incorporate another poet’s words into one’s verse, indicating the source if the borrowed passage is not famous among skilled readers.
Taḍmīn inserts a line, half-line, or recognizable part of another poet’s verse into a new poem. Its source is earlier poetry, unlike iqtibās, whose sources are the Qur’an and Hadith.
When the inserted material is not well known, an indication should show the reader that it has been taken from another poet. Otherwise the new poet may appear to be claiming the borrowed words as original.