Supplication when something is difficult

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دُعَاءُ مَنِ اسْتَصْعَبَ عَلَيْهِ أَمْرٌ
اللَّهُمَّ لَا سَهْلَ إِلَّا مَا جَعَلْتَهُ سَهْلًا وَأَنْتَ تَجْعَلُ الْحَزْنَ إِذَا شِئْتَ سَهْلًا
Supplication when facing difficulty

O Allah, nothing is easy except what You make easy, and You make difficulty easy if You will.

المصدر قيد المراجعة.

From the Hadith library

Hadith
Abdullah reported: We prayed along with the Messenger of Allah (may peace he upon him) and he committed or omitted (something). Ibrahim said: By Allah, this is a misgiving of mine only. We said: Messenger of Allah, is there something new about the prayer? He (the Holy Prophet) said: No. We told him about what he had done. He (the Holy Prophet) said: When a man commits or omits (something in prayer), he should perform two prostrations, and he then himself performed two prostrations.