وآخر دعوانا أن الحمد لله رب العالمين
Wa Ākhiru Daʿwānā anna al-Ḥamda li-Llāhi Rabbi’l-ʿĀlamīn
Our final word is that all praise belongs to Allah, Lord of the worlds; said at the end of a speech, a meeting or any undertaking
What it means
Muslims say these words to close a talk, a gathering, a meal or a piece of work. They mean: “The last of our call is that praise belongs to Allah, Lord of the worlds.” The wording comes from the Quran, which describes the people of Paradise greeting one another with peace, and says that “the last of their call is: Praise be to Allah, Lord of the worlds” (10:10). In this way every undertaking ends with thanks, as it began with the name of Allah. The usual Quranic form has “their call”, and speakers who use it of themselves change the pronoun to “our”.
Often misunderstood as
That it is an empty closing formula, when it turns the end of any activity into thanks to Allah.
Term and Arabic as listed in Ismail al Faruqi, Toward Islamic English (International Institute of Islamic Thought, 1995), p. 58, listed as WA ĀKHIRU DA‘WĀNĀ ANNA AL ḤAMDA LILLAHI RABB AL ‘ĀLAMĪN.. The definition is restated here.