Ibn Tawus narrates from his father that my father and Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) came into the presence of the Commander of the Believers, Sayyiduna Umar bin al-Khattab (may Allah be pleased with him), and asked him: "Will you not inform the people about the matter of this mut'ah (Hajj al-Tamattu')?" At this Sayyiduna Umar (may Allah be pleased with him) said: "Is there now anyone left who has not done it? As for me, I myself practise it."
In this narration, "mut'ah" means Hajj al-Tamattu', in which ihram is removed after performing Umrah in the months of Hajj, and then ihram for Hajj is entered on the same journey. The intent of Sayyiduna Umar (may Allah be pleased with him) was that the legitimacy of this practice had now become so common and well known that no ambiguity of any kind remained about it.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الحج / 1179
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :رجاله ثقات. » «انفرد به المصنف من هذا الطريق»