Al-Anbya 21:83

Waayyooba ith nadarabbahu annee massaniya addurru waanta arhamuarrahimeen

And [mention] Job, when he called to his Lord, "Indeed, adversity has touched me, and You are the most merciful of the merciful."

And (remember) Ayyūb (Job), when he called his Lord saying, “Here I am, afflicted by pain and You are the most merciful of all the merciful.”