Al-Kāfi

Hadith 1788
duabrotherhood
7ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ النَّوْفَلِيِّ عَنِ السَّكُونِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ قَالَ النَّبِيُّ (صَلَّى اللهُ عَلَيْهِ وآلِه) لَيْسَ شَيْ‏ءٌ أَسْرَعَ إِجَابَةً مِنْ دَعْوَةِ غَائِبٍ لِغَائِبٍ.
7. Ali ibn Ibrahim has narrated from his father from al-Nawfali from al-Sakuni from Abu ‘Abdillah (a.s.) who has said the following: “The Holy Prophet has said, ‘No prayer is more quickly accepted than the prayer of one unseen for another unseen, that is, in each other’s absence.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī