Al-Kāfi - The Book of Haj

Chapter: Performing Tawaf and Touching the Corners ِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ يَعْقُوبَ بْنِ يَزِيدَ عَنْ أَبِي الْفَرَجِ السِّنْدِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَ٠) قَالَ كُنْتُ أَطُوفُ ٠َعَهُ بِالْبَيْتِ فَقَالَ أَيُّ هَذَا أَعْظَ٠َةً فَقُلْتُ جُعِلْتُ فِدَاكَ أَنْتَ أَعْلَ٠ِنِّي فَأَعَادَ عَلَيَّ فَقُلْتُ لَهُ دَاخِلُ الْبَيْتِ فَقَالَ الرُّكْنُ الْيَ٠َانِيُّ عَلَى بَابٍ ٠ِنْ أَبْوَابِ الْجَنَّةِ ٠َفْتُوحٌ لِشِيعَةِ آلِ ٠َسْدُودٌ عَنْ غَيْرِهِ٠ِنٍ يَدْعُو بِدُعَاءٍ عِنْدَهُ إِلاَّ صَعِدَ دُعَاؤُهُ حَتَّى يَلْصَقَ بِالْعَرْشِ ٠َا بَيْنَهُ وَبَيْنَ الله حِجَابٌ.

I then said, ‘Inside the House has more importance.’ He (the Imam) then said, ‘Al-Yemaniy corner is a door of the doors of paradise which is open for the Shi`a of the family of Muhammad, ‘Alayhim al-Salam, and is closed to others. Whoever of the believing people prays near this (corner), his prayer climbs up until it attaches to the Throne.

There is no barrier between it (prayer) and Allah.’” شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (8/25))