Sahih al-Bukhari · Hadith 6591

To make the Heart Tender (Ar-Riqaq)

Narrated Haritha bin Wahb: I heard the Prophet (ﷺ) mentioning the Lake-Fount (Al-Kauthar), saying, "(The width of the Lake-Fount) is equal to the distance between Medina and Sana' (capital of Yemen)