Dua Upon Finding Something Difficult

اللَّهمَّ لا سَهْلَ إِلاَّ مَا جَعَلتَه ُُ سَهْلا، ً وَأَنْتَ تَجْعَلُ الحَزَنَ إِذَا شِئْتَ سَهْلا
'Allaahuma lasahla illa maja'altawho sahla wa anta tej'aloo alhazna 'idha shi'ta sahla.'
(O Allah, there is no ease except in that which You have made easy, and You make the difficulty, if You wish, easy.) (Ibn Alsanni)