al-Muzanī, a companion of Imām al-Shāfiʿī, said: "The Companions of the Messenger of Allāh (ṣallá Allāhu ʿalayhi wa-sallam) differed, some of them considering others to be mistaken, and they examined each other's statements and critiqued them. If all their statements were correct in their view, they would not have done that. ʿUmar ibn al-Khaṭṭāb was angered by the disagreement between Ubayy ibn Kaʿb and Ibn Masʿūd regarding praying in a single garment, as Ubayy said: 'Praying in a single garment is good and beautiful.' Ibn Masʿūd said: 'That was only when garments were scarce.' So ʿUmar went out angrily and said: 'Two men from the Companions of the Messenger of Allāh (ṣallá Allāhu ʿalayhi wa-sallam) who are looked up to and taken from have disagreed. Ubayy is truthful and Ibn Masʿūd did not fall short, but I will not hear anyone differ on this after my position here except that I will do such and such to him.'" Imām al-Muzanī also said: "It is said to the one who permits disagreement and claims that when two scholars exert effort in a matter, and one says: 'Permissible' and the other: 'Prohibited,' that each of them in their effort is correct: Did you say this based on a principle or analogy? If he says: 'Based on a principle,' it is said to him: 'How can it be a principle when the Book negates disagreement? And if you say: 'By analogy,' it is said: 'How can the principles negate disagreement, and you are allowed to analogize to permit disagreement? This is something no rational person, let alone a scholar, would allow.' If someone says: 'What I mentioned contradicts what is narrated from Imām Mālik, that the truth is one and does not multiply, as found in the book "al-Madkhal al-Fiqhī" by Ustādh al-Zarqā (1/89): 'Abū Jaʿfar al-Manṣūr, and then al-Rashīd after him, intended to choose a school of thought