Hisnul Muslim 194

Upon seeing someone in trial or tribulation

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

Alhamdu lillaahil-lathee 'aafaanee mimmab-talaaka bihi wa fadhdhalanee 'alaa katheerin mimman khalaqa tafdheela.

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.