" It is He who sent down tranquillity into the hearts of the believers..."

{ It is He who sent down tranquillity into the hearts of the believers that they would increase in faith along with their [present] faith. And to Allah belong the soldiers of the heavens and the earth, and ever is Allah Knowing and Wise. }
Quran ( 48 : 4 )
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#happiness_in_the_quran
https://noorinternational.net/articles/Happiness-in-the-Quran