Sahih Bukhari
To make the Heart Tender (Ar-Riqaq)
Volume: 008 / Book Number: 076 / Hadith Number: 486
Narrated Abu Huraira:
The Prophet said Allah will give shade to seven (types of people) under His Shade (on the Day of Resurrection). (one of them will be) a person who remembers Allah and his eyes are then flooded with tears.