Pronunciation: Allahumma ati nafsi taqwaha, wa zakkiha Anta khairu man zakkaha, Anta waliyyuha wa maulaha.
Meaning: O Allah! Grant me the sense of piety and purify my soul as You are the Best to purify it. You are its Guardian and its Protecting Friend.
Reference: Sahih Muslim Book 17, Hadith 15