«بُرْهَةً ... نُزْهَةً ... شُبْهَةً»
A period of time ... enjoyment ... a doubt.
The similar endings create sajʿ, or rhymed prose. The sequence also carries meaning: a stretch of time, the joy it brings, and the doubts that are removed.
Sajʿ is the patterned ending of prose phrases. It should not be confused with a poem governed by a regular metrical structure.