Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:4215Isḥāq b. Ibrāhīm > ʿAbd al-Razzāq > Maʿmar > al-Zuhrī > Sālim from his father

[Machine] "Umrah during the months of Hajj is a complete act that the Messenger of Allah ﷺ performed and Allah revealed it in His book."  

الكبرى للنسائي:٤٢١٥أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ قَالَ أَخْبَرَنَا عَبْدُ الرَّزَّاقِ قَالَ حَدَّثَنَا مَعْمَرٌ عَنِ الزُّهْرِيِّ عَنْ سَالِمٍ عَنْ أَبِيهِ قَالَ

«الْعُمْرَةُ فِي شُهُورِ الْحَجِّ تَامَّةٌ قَدْ عَمِلَ بِهَا رَسُولُ اللهِ ﷺ وَأَنْزَلَهَا اللهُ فِي كِتَابِهِ»