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.
bukhari:1781Aḥmad b. ʿUthmān > Shurayḥ b. Maslamah > Ibrāhīm b. Yūsuf from his father > Abū Isḥāq > Saʾalt

I asked Masruq, ʿAta' and Mujahid (about the ʿUmra of Messenger of Allah ﷺ). They said, "Messenger of Allah ﷺ had performed ʿUmra in Dhi-l-Qa'da before he performed Hajj." I heard Al-Bara' bin ʿAzib saying, "Messenger of Allah ﷺ had performed ʿUmra in Dhi-l-Qa'da twice before he performed Hajj."  

البخاري:١٧٨١حَدَّثَنَا أَحْمَدُ بْنُ عُثْمَانَ حَدَّثَنَا شُرَيْحُ بْنُ مَسْلَمَةَ حَدَّثَنَا إِبْرَاهِيمُ بْنُ يُوسُفَ عَنْ أَبِيهِ عَنْ أَبِي إِسْحَاقَ قَالَ

سَأَلْتُ مَسْرُوقًا وَعَطَاءً وَمُجَاهِدًا فَقَالُوا اعْتَمَرَ رَسُولُ اللَّهِ ﷺ فِي ذِي الْقَعْدَةِ قَبْلَ أَنْ يَحُجَّ وَقَالَ سَمِعْتُ الْبَرَاءَ بْنَ عَازِبٍ ؓ يَقُولُ اعْتَمَرَ رَسُولُ اللَّهِ ﷺ فِي ذِي الْقَعْدَةِ قَبْلَ أَنْ يَحُجَّ مَرَّتَيْنِ