Al-Kāfi

Hadith 1680
friday-prayerduacongregational-prayer
3ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنْ يُونُسَ عَنْ أَبَانٍ عَنْ إِسْمَاعِيلَ الْجُعْفِيِّ عَنْ عُمَرَ بْنِ حَنْظَلَةَ قَالَ قُلْتُ لأَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) الْقُنُوتُ يَوْمَ الْجُمُعَةِ فَقَالَ أَنْتَ رَسُولِي إِلَيْهِمْ فِي هَذَا إِذَا صَلَّيْتُمْ فِي جَمَاعَةٍ فَفِي الرَّكْعَةِ الأولَى وَإِذَا صَلَّيْتُمْ وُحْدَاناً فَفِي الرَّكْعَةِ الثَّانِيَةِ قَبْلَ الرُّكُوعِ.
3. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus from Aban from ’Isma‘il al-Ju’fiy from ‘Umar ibn Hanzalah who has said the following: “I once asked abu ‘Abd Allah (a.s.), about Qunut (supplication after recitation) on Friday. He (the Imam) said, ‘You are my messenger to them in this matter. When performing in congregation, it is in the first Rak‘at, but when performing alone, it is in the second Rak‘at before Ruku‘ (bowing down on one’s knees).”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī