Killing Harmful Insects During Prayer

Abu Hurairah reported that the Prophet Muhammad (peace and blessings be upon him) said, “Kill the two black ones during prayer, the snake and the scorpion.” (Sunan Abu Dawud, Al-Tirmidhi and al-Nasa’i)

In view of this narration, if a person kills a harmful insect while praying without moving more than what is regarded as acceptable, then this is okay and the prayer is still valid.