Supplication for overcoming difficulties

اَللّٰهُمَّ لَا سَهْلَ اِلَّا مَا جَعَلْتَهٗ سَهْلًا ، وَّاَنْتَ تَجْعَلُ الْحَزْنَ اِذَا شِئْتَ سَهْلًا

O Allah! Nothing is easy except what You make easy, and You make the difficult easy when You will.

1. Sahih, 'Amal al-Yawm wa al-Laylah of Ibn as-Sunni, no. (351), the wording is his, Sahih Ibn Hibban, no. (974), and al-Albani graded it Sahih in as-Sahihah no. (2886).