Anas (May Allah be pleased with him) said that when the Messenger of Allah (peace and blessings of Allah be upon him), was faced with a serious difficulty, he would always supplicate, "Ya Hayyu, ya Qayyumu, bi-rahmatika astaghithu (O the Living, O the Eternal, I seek help in Your grace).

Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah Sall-Allahu alayhi wa sallam said, "There are two statements that are light for the tongue to remember, heavy in the Scales and are dear to the Merciful: `Subhan-Allahi wa bihamdihi, Subhan-Allahil-Azim [Glory be to Allah and His is the praise, (and) Allah, the Greatest is free from imperfection)'.''
[Al-Bukhari and Muslim].