Al-Kāfi - Volume 4 > The Acts of Obligatory al-’Umrah
Hadith #2

2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ قَالَ سَأَلْتُ أَبَا الْحَسَنِ (عَلَيْهِ السَّلاَم) عَنِ الْعُمْرَةِ أَ وَاجِبَةٌ هِيَ قَالَ نَعَمْ قُلْتُ فَمَنْ تَمَتَّعَ يُجْزِئُ عَنْهُ قَالَ نَعَمْ.

2. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from ibn abu Nasr who has said the following: “I once asked abu al-Hassan, ‘Alayhi al-Salam, about al- £ Umrah; if it is obligatory. He (the Imam) said, £ Yes, it is obligatory.’ I then asked, ‘If one is for al-Tamattu £ (advantageous) is it sufficient?’ He (the Imam) said, £ Yes, it is sufficient.’” (Fatwa best explains Hadith 2 of this Chapter)