When Islam came, it was keen to preserve the five necessities that all divine legislations came to preserve, and these are: religion, life, honor, mind, and wealth. It began to be legislated for society gradually so that people could adopt it rightly and not forsake it all at once. In this Hadīth, the noble Tābi‘i Khālid ibn al-Muhājir ibn Sayfullāh informs that while he was sitting with a man - who was ‘Abdullāh ibn ‘Abbās (may Allah be pleased with him), according to the Mustakhraj of Abu ‘Awānah - a man came to him and sought a Fatwa from him about the ruling on marrying women by Mut‘ah marriage for a specific period in return for compensation agreed between them; Ibn ‘Abbās (may Allah be pleased with him), permitted him to marry women by Mut‘ah marriage. Thereupon, the Tābi‘i Ibn Abi ‘Amrah al-Ansāri - Muhammad ibn ‘Abdur-Rahmān ibn Hārithah - said to Ibn ‘Abbās: 'Wait!' i.e., stop and do not rush. Ibn ‘Abbās (may Allah be pleased with him) said to him: "What is it?!" i.e., what is the matter that could prevent me from giving this Fatwa?! It seems he was criticizing him. By this, Ibn' Abbās (may Allah be pleased with him) wanted to reject Ibn Abi' Amrah's disapproval of his Fatwa. Then, he swore by Allah that it was practiced during the lifetime of the leader of the pious, referring to the Prophet (may Allah's peace and blessings be upon him). The meaning: How could you criticize me while the people practiced it during the lifetime of the Prophet (may Allah's peace and blessings be upon him), at his command?! In reply, Ibn Abi ‘Amrah said that Mut‘ah was a dispensation for Muslims in the early days of Islam for those driven to it by necessity, just like a person driven by necessity to eat carrion, blood, and pork, if he is on the verge of death due to severe hunger. Then Allah completed the religion, perfected His commands and prohibitions, and permanently forbade marrying women by Mut‘ah marriage. Indeed, Ibn ‘Abbās (may Allah be pleased with him) spoke the truth when he swore that it was practiced during the lifetime of the Prophet (may Allah's peace and blessings be upon him). But Ibn Abi ‘Amrah was right, for the Messenger of Allah (may Allah's peace and blessings be upon him) passed away while the prohibition of Mut‘ah was the latter of the two relevant rulings. The Hadīth demonstrates that some of the Shar‘i rulings were superseded (abrogated). It indicates that taking an oath for emphasis is legitimate. It also shows that a great scholar may be unaware of some Shar‘i issues..