It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) regarding the Quranic verse: «﴿وَإِذْ يَمْكُرُ بِكَ الَّذِينَ كَفَرُوا﴾ [الأنفال: 30] » "And [remember] when those who disbelieved plotted against you to restrain you or kill you or evict you..." that once, at night, the Quraysh consulted together in Makkah. Some said: "In the morning, shackle Muhammad (peace and blessings be upon him) in chains." Some said: "Kill him." And some advised to expel him. Allah Almighty informed the Prophet (peace and blessings be upon him) of the polytheists' plotting. So that night, Sayyiduna Ali (may Allah be pleased with him) slept on the Prophet's (peace and blessings be upon him) bed, and the Prophet (peace and blessings be upon him) left there and went to prayer. The polytheists kept watch all night, thinking Sayyiduna Ali (may Allah be pleased with him) was the Prophet (peace and blessings be upon him), and at dawn they attacked, but found Sayyiduna Ali (may Allah be pleased with him) there. Thus Allah returned their plot upon themselves. They said: "Where is your companion?" Sayyiduna Ali (may Allah be pleased with him) replied: "I do not know." Then they set out searching for the Prophet's (peace and blessings be upon him) footprints. When they reached the mountain, they became confused. They climbed the mountain and also passed by the cave (where the Prophet, peace and blessings be upon him, had taken refuge), but at the mouth of the cave they saw a spider's web. Seeing this, they said: "If he were here, there would not be a spider's web at the mouth of the cave." The Prophet (peace and blessings be upon him) stayed in that cave for three days.