Du'a when seeing someone afflicted

الْحَمْدُ لِلَّهِ الَّذِي عَافَانِي مِمَّا ابْتَلَاكَ بِهِ، وَفَضَّلَنِي عَلَى كَثِيرٍ مِمَّنْ خَلَقَ تَفْضِيلًا

Alhamdu lillahil-ladhi 'afani mimma-btalaka bihi wa faddalani 'ala kathirin mimman khalaqa tafdila.

Praise is to Allah Who has spared me what He has afflicted you with, and preferred me greatly above much of what He has created.

Sunan al-Tirmidhī 3431