The Sufficient (Vol 4) · Hadith 1514 (#Ḥadīth #11)
Chapter 123 | Performing Tawaf and Touching the Corners
11ـ أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ عَلِيٍّ عَنْ رِبْعِيٍّ عَنِ الْعَلاءِ بْنِ الْمُقْعَدِ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلاَم) يَقُولُ إِنَّ الله عَزَّ وَجَلَّ وَكَّلَ بِالرُّكْنِ الْيَمَانِيِّ مَلَكاً هِجِّيراً يُؤَمِّنُ عَلَى دُعَائِكُمْ.
11. Ahmad ibn Muhammad has narrated from al-Husayn ibn Ali from Rib’iy from al-‘Ala’ ibn al-Muq‘ad who has said the following: “I once heard abu ‘Abd Allah , say, ‘Allah, the Most Majestic, the Most Glorious, has assigned a Hijjir (persistent in doing something) angel on al-Yemaniy corner who says ‘Amen’ when you pray to Allah.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).