"Certainly was Allah pleased with the believers when they pledged allegiance to you, [O Muhammad].."

{ Certainly was Allah pleased with the believers when they pledged allegiance to you, [O Muhammad], under the tree, and He knew what was in their hearts, so He sent down tranquillity upon them and rewarded them with an imminent conquest }
Quran ( 48 : 18 )
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#happiness_in_the_quran
https://noorinternational.net/articles/Happiness-in-the-Quran