Surah Yunus, Ayat 89-90

Ayat 89. Allah said: "Verily, the invocation of you both is accepted. So you both keep to the Straight Way (i.e. keep on doing good deeds and preaching Allah's Message with patience), and follow not the path of those who know not (the truth i.e. to believe in the Oneness of Allah, and also to believe in the Reward of Allah: Paradise, etc.)."

Ayat 90. And We took the Children of Israel across the sea, and Firaun (Pharaoh) with his hosts followed them in oppression and enmity, till when drowning overtook him, he said: "I believe that La ilaha illa (Huwa): (none has the right to be worshipped but) He," in Whom the Children of Israel believe, and I am one of the Muslims (those who submit to Allah's Will)." 

Hazrat Ali (May Allah be pleased with him) reported: The Messenger of Allah  [SAWW](PBUH) said to me, "Recite: `Allahumma-hdini wa saddidni (O Allah! Direct me to the Right Path and make me adhere to the Straight Path).'' Another narration is: `Allahumma inni as'aluk-alhuda was-sadad (I beg You for guidance and uprightness).'' [Muslim Book 35, Number 6573].

Lesson : as mentioned above in Surah Yunus Ayat 89. "So you both keep to the Straight Way (i.e. keep on doing good deeds and preaching Allah's Message with patience)," This Hadith brings out the following points: "As-Sadad'' means correctness and uprightness. Here, it signifies "please grant me the ability to do everything in a correct manner'', that is in accordance with the practice of the Prophet  [SAWW](PBUH). Some scholars of Hadith have interpreted it as steadfastness and moderation. Both interpretations accord well with its original meanings.