Allaahumma laa sahla 'illaa maal ja'altahu sahlan wa 'Anta taj'alul-hazna 'ithaa shi'ta sahlan.
139. O Allah, there is no ease other than what You make easy. If You please You ease sorrow.
Ibn Hibban in his Sahih (no. 2427), and Ibn As- Sunni (no. 351). Al-Hafidh (Ibn Hajar) said that this Hadith is authentic. It was also declared authentic by 'Abdul-Qadir Al-Arna'ut in his checking of An-Nawawi's Kitabul-Athkarp. p106.