Sa‘d said:

When I was ill the Prophet (ﷺ) came to visit me, and putting his hand between my nipples so that I felt its coolness on my heart, he said, “You are suffering from a heart disease. Go to al-Harith b. Kalada who belongs to Thaqif, for he practices medicine, and get him to take seven of the <i>'ajwa</i> dates of Medina and pound them together with their stones, then administer them to you.” Abu Dawud transmitted it.

وَعَن سعدٍ قَالَ: مَرِضْتُ مَرَضًا أَتَانِي النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَعُودُنِي فَوَضَعَ يَدَهُ بَيْنَ ثَدْيِيَّ حَتَّى وَجَدْتُ بَرْدَهَا عَلَى فُؤَادِي وَقَالَ: «إِنَّكَ رجلٌ مفْؤودٌ ائْتِ الْحَارِثَ بْنَ كَلَدَةَ أَخَا ثَقِيفٍ فَإِنَّهُ رجل يتطبب فليأخذ سبع تمرات منم عَجْوَةِ الْمَدِينَةِ فَلْيَجَأْهُنَّ بِنَوَاهُنَّ ثُمَّ لِيَلُدَّكَ بِهِنَّ» . رَوَاهُ أَبُو دَاوُد