It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that once the Prophet (peace and blessings be upon him) requested Jibreel (peace be upon him) to show himself in his original form. He said, "Pray to your Lord." The Prophet (peace and blessings be upon him) prayed, and at that very moment, a cloud rose from the east which gradually began to ascend and spread. When the Prophet (peace and blessings be upon him) saw this, he fell unconscious and collapsed. Jibreel (peace be upon him) came to the Prophet (peace and blessings be upon him), lifted him up, and wiped the saliva that was coming out from both sides of his mouth.