When amazed or given good news: Allahu Akbar

'Umar said this on hearing surprising news, and the Companions said it on receiving glad tidings. Follow any timing or count stated in the cited narration; otherwise it may be used as a general personal du'a.

The Arabic and meaning are paired with Sahih al-Bukhari 6218, Sahih al-Bukhari 3348. No special promise or count is added without a cited basis.