The Prophet (Allah bless him and give him peace) said, “The supplication of my brother Dhun Nun (Yunus, peace be upon him), who called on Allah while in the whale’s belly: ‘There is no deity but You. Glory be to You! Verily, I have been
among the wrongdoers’ (Quran 21:87) – no Muslim person says it, for any situation whatsoever, except that Allah Most High answers his call.” [Tirmidhi]
Shahr ibn Hawshab (Allah be well-pleased with him) said, “I said to Umm Salama, ‘O Mother of the believers! What was the most frequent supplication of the Messenger of Allah, may Allah bless him and give him peace, when he was with you?’ She said, “His most frequent supplication was, ‘O Turner of the hearts, make my heart firm in Your deen!’” [Tirmidhi]
“O Lord! Grant us good in this life, and good in the next, and save us from the torment of the Fire.” [Qur’an, 2:201]
When the Prophet (Allah bless him and give him peace) would be afflicted with a stressful trial, he would say, “O Living and Eternal Maintainer! By Your mercy I seek help!” [Tirmidhi]
“My lord, I am in absolute need of the good You send me.” [Qur’an, 28:24]
When a man got angry in front of the Prophet (Allah bless him and give him peace), he told his companions, “I know some words that would make his anger leave, if he said them. They are, ‘I seek refuge in Allah from Satan’.” [Bukhari]