when the Prophet of Allah passed away, the Commander of the Faithful Imam ‘Ali was busy in his funeral proceedings. The Emigrants (Muhajirin) and helpers (Ansar) were waiting to see the reaction of Imam ‘Ali and the Bani Hashim.
Satan assumed the form of Mughirah b. Shu’bah, the squint-eyed man of the Bani Thaqif and came to them saying, “What are you waiting for?” They replied that they were waiting for the Bani Hashim to conclude their tasks. Mughirah (Satan) said, “Go and complete the task for by Allah, if you wait for the Bani Hashim to finish up with the burial proceedings of the Prophet, you will always be under their influence and shall shift the affairs of the caliphate (to them), which is similar to the caesars of Rome and chosroes of Persia.
Some time back, a group of Qurayshite men had consented and written upon a scroll that if the Prophet died or was killed, they would divert the authority from the Bani Hashim so that both the position of prophethood, as well as caliphate would not be combined in them. They kept this as a trust with Abu ‘Ubaydah al-Jarrah and then Satan in the form of Mughirah) came to the Ansar and incited them to take the reins of the caliphate into their hands and adviced them similarly. Thus, the Ansar proceeded towards Saqifah Bani Sa’idah.”
House of Sorrows Translation of Baytul AhzanShaikh Abbas Al – Qummi