Supplications the Prophet ﷺ said when grief, fear or hardship pressed on him.
لَا إِلَٰهَ إِلَّا اللَّهُ الْعَظِيمُ الْحَلِيمُ، لَا إِلَٰهَ إِلَّا اللَّهُ رَبُّ الْعَرْشِ الْعَظِيمِ
Lā ilāha illā Llāhu l-ʿAẓīmu l-Ḥalīm, lā ilāha illā Llāhu Rabbu l-ʿarshi l-ʿaẓīm
There is no god but Allah, the Magnificent, the Forbearing. There is no god but Allah, Lord of the Mighty Throne.
Source: Ṣaḥīḥ al-Bukhārī 6345
اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْهَمِّ وَالْحَزَنِ، وَالْعَجْزِ وَالْكَسَلِ
Allāhumma innī aʿūdhu bika mina l-hammi wa-l-ḥazan, wa-l-ʿajzi wa-l-kasal
O Allah, I seek refuge in You from anxiety and sorrow, from helplessness and laziness.
Source: Ṣaḥīḥ al-Bukhārī 6369
حَسْبُنَا اللَّهُ وَنِعْمَ الْوَكِيلُ
Ḥasbunā Llāhu wa niʿma l-wakīl
Allah is sufficient for us, and He is the best disposer of affairs.
Source: Quran 3:173