إذَا عَادَ الرَّجُلُ أخَاهُ المُسْلِمَ، مَشَى فِي خِرَافَةِ الجَنَّةِ حَتَّى يَجْلِسَ، فَإذَا جَلَسَ غَمَرَتْهُ الرَّحْمَةُ، فَإنْ كَانَ غُدْوَةً صَلَّى عَلَيْهِ سَبْعُونَ ألْفَ مَلَكٍ حَتَّى يُمْسِيَ، و إنْ كَانَ مَسَاءً صَلَّى عَلَيْهِ سَبْعُونَ ألْفَ مَلَكٍ حَتَّى يُصْبِحَ

If a man calls on his sick Muslim brother, it is as if he walks reaping the fruits of Paradise until he sits, and when he sits he is showered in mercy, and if this was in the morning, seventy thousand angels send prayers upon him until the evening, and if this was in the evening, seventy thousand angels send prayers upon him until the morning.

Reference: If a man calls on his sick Muslim brother, it is as if he walks reaping the fruits of Paradise until he sits, and when he sits he is showered in mercy, and if this was in the morning, seventy thousand angels send prayers upon him until the evening, and if this was in the evening, seventy thousand angels send prayers upon him until the morning. Al-Tirmidhī (#969), Ibn Mājah (#1442) and Aḥmad (1/97). Also see _Ṣaḥīḥ Ibn Mājah_ (1/244) and _Ṣaḥīḥ al-Tirmidhī_ (1/286). Shaykh Aḥmad Shākir also authenticated it.