He who gives blessings and prosperity, particularly to those who use these gifts as He has said, and is merciful to the believers in the Hereafter.
“He it is who sent down clear revelations unto His Slave (Muhammad), that He may bring you forth from darkness unto light; and lo! for you, Allah is Full of Pity, MERCIFUL”
(57:9) The Holy Quran
From the root r-h-m with the classical Arabic connotations: to have tenderness, gentleness, kindness to love to have mercy, to have pity to show favor and goodness.