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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:8769 – Abū Bakr b. al-Ḥārith al-Faqīh > ʿAlī b. ʿUmar al-Ḥāfiẓ > Muḥammad b. al-Qāsim b. Zakariyyā > ʿAbbād b. Yaʿqūb > Ibrāhīm b. Abū Yaḥyá > Dāwud > ʿIkrimah > Ibn ʿAbbās

[Machine] Umrah is obligatory just like Hajj, and it is known as the lesser pilgrimage.  

البيهقي:٨٧٦٩ – أَخْبَرَنَا أَبُو بَكْرِ بْنُ الْحَارِثِ الْفَقِيهُ أنبأ عَلِيُّ بْنُ عُمَرَ الْحَافِظُ ثنا مُحَمَّدُ بْنُ الْقَاسِمِ بْنِ زَكَرِيَّا ثنا عَبَّادُ بْنُ يَعْقُوبَ ثنا إِبْرَاهِيمُ بْنُ أَبِي يَحْيَى عَنْ دَاوُدَ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ

الْعُمْرَةُ وَاجِبَةٌ كَوُجُوبِ الْحَجِّ وَهُوَ الْحَجُّ الْأَصْغَرُ