Upon close inspection, the person found that a wasp had entered the kurta of Imaam Bukhaari (rahimahullah) while he was performing salaah and had stung him sixteen or seventeen times, causing his body to become swollen.

Observing the painful injury, someone asked, “Why did you not hasten in completing your salaah when you were stung the first time?” Imaam Bukhaari (rahimahullah) replied, “I was engaged in reciting a surah, and I did not wish to end the salaah without completing it.”

(Siyar ‘Alaamin Nubalaa 12/442)