Abu al-Aliyah (may Allah have mercy on him) narrated that a blind man came while the Prophet (peace and blessings be upon him) was in prayer, and he fell into a well, so some of the Companions (may Allah be pleased with them) laughed. The Prophet (peace and blessings be upon him) ordered: "Whoever laughed should perform ablution again and repeat the prayer."
This hadith is mursal. The mursal reports of Abu al-Aliyah carry no weight.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 679