ثُمَّ إِنَّهُ لَبِدَ عَجَاجَتَهُ
Then the commotion of his speech subsided.
ʿAjājah evokes rising dust and turbulence. Here the settling of that dust becomes a metaphor for the end of his resonant, forceful utterance. Speech is not literally dust; the comparison makes the arrival of quiet tangible.
The listener's attention now shifts from language alone to the preacher's physical preparations to leave.