ثُمَّ أَنْشَدَ
Then he recited verses.
Anshada commonly means to recite poetry aloud. This short sentence completes a stage of the prose sermon and signals a change of literary form.
So far the preacher has used rhymed prose (sajʿ). The next passage will use verse and poetic rhythm to develop the same warning against worldly absorption. Recognizing that formal shift is part of reading the maqāmah well.