Allah is the source of all power and strength. Therefore there's no power nor strength for people. So one has to rely on Him in everything and doesn't depend on himself, power, strength, youth, the integrity of his opinion, money, honor, pedigree, authority, the intercession of peoples, or anything else, and the Importance of Istikharah prayer in all matters appears here. Therefore prophet Muhammad, peace be upon him, taught it to his companions such as any chapter (Surah) from the Quran. This article dealt with this matter by illustrating a prophetic hadeeth on Istikharah's pray and its necessity in all issues.