HAKIM 1269:
from Ibn ʿAbbās —
[Machine] The Messenger of Allah ﷺ said, "Whoever visits his Muslim brother and sits by his head, then says seven times, 'I ask Allah, the Great, the Lord of the Great Throne, to cure you of your illness, if it is not his appointed time (to die),' Allah will cure him of his illness if it is not his appointed time."
الحاكم ١٢٦٩:
عن ابن عباس —
قَالَ رَسُولُ اللَّهِ ﷺ مَنْ عَادَ أَخَاهُ الْمُسْلِمَ فَقَعَدَ عِنْدَ رَأْسِهِ ثُمَّ قَالَ سَبْعَ مَرَّاتٍ أَسْأَلُ اللَّهَ الْعَظِيمَ رَبَّ الْعَرْشِ الْعَظِيمِ أَنْ يَشْفِيَكَ عُوفِيَ إِنْ لَمْ يَكُنْ أَجَلُهُ حَضَرَ
hadithunlocked.com