Does audible laughter invalidate prayer?
Chapter on the Two Prostrations of Forgetfulness
Al-Mughni
Book of Prayer
Primary text
If a person laughs audibly such that two letters become apparent, the prayer is invalidated. This ruling is established based on the narration from Jabir ibn Abdullah, who reported from the Prophet, peace be upon him, saying: "Laughter invalidates the prayer but does not invalidate ablution." This hadith was reported by Al-Daraqutni in his Sunan.